Great plans, edsh! Hope you enjoy your trip!

The loop you describe is a good start.

Denali is about a four-hour drive from Anchorage (five tops), so depending on what time you pick it up, you should easily be able to make it unless you really don't want to. There isn't much between Wasilla and Denali, so if you're going to stay the night somewhere in your RV, your choices are limited to Talkeetna (worth the 20-mile side trip) and perhaps a small handful of places that aren't near any major settlements (there are some pulloffs in Denali State Park without hookups or facilities that may work). Remember, too, that the sun will be up for a good maybe 16-18 hours in August, and along with the extended daylight will come a feeling of extra energy. In Anchorage, you'll find people out biking, running, or just wandering around the town well past 9 or 10 pm, and you may be more than happy to drive longer distances than you otherwise would in normal daylight.

I strongly suggest ordering a copy of The Milepost, available at a discount at Amazon.com, which will tell you exactly where facilities for parking your RV are and much, much more. You will find it invaluable in planning for your trip.

If you have the time, a second day in Denali could be used to do some of the activities located near the park entrance, such as whitewater rafting, the sled dog demonstration, or, if you discover a great area on your bus trip on the first day you'd like to explore, a return to that area for some hiking. See the Wikitravel article on Denali for a fairly comprehensive description of what's available in and near the park. (Browse through the Wikitravel articles on Alaska and some of the cities and regions of Alaska for some more good reading material.) If none of those activities sounds like your cup of tea, I think a single day in Denali riding the bus as far as you want would suffice. Of course, a second day gives you the option to shuffle the bus ride if the weather isn't cooperating on the first day (though don't despair if you don't actually see the mountain--relatively few people do!).

I've only driven the Denali Highway once--probably about 12 or so years ago--and while it wasn't too bad, it isn't I-95. I hesitate to say that you'll be fine doing it in an RV, but I wouldn't rule it out altogether. The scenery is unique--I got the feeling that I was driving on the surface of the moon (especially after dark!), since it's very wide open and barren, although you do see some mid-height mountains in the distance. It's not overly spectacular, though, and if you determine that risks exist, I wouldn't feel too bad about skipping it. The Milepost may help you with this decision, but perhaps other FTers who have driven it more recently can comment, too.

If you do end up skipping the Denali Highway, it's not actually much longer just to keep driving north through Fairbanks and then back down south, since you can do 55-65 the whole way (or whatever an RV tops out at). While you're in Fairbanks, some of the touristy attractions actually aren't all that bad--I didn't do the Riverboat Discovery or El Dorado Gold Mine, but their brochures actually made them look like fun. If you're into technology and the sciences, UAF has a well-respected geophysical institute which offers tours (2008 tours; 2009 ones are not yet posted), and getting up close and personal with the Trans-Alaska Pipeline System is always fun. Even if you're not into those things, the UAF Museum of the North has a very good collection of exhibits about Alaskan history and living. If you have extra time (perhaps not likely), Chena Hot Springs is, as I recently found out myself, worth the soak (although I think my impression was affected by the novelty of having my body at 106 degrees and my head at negative 20... ).

The McCarthy road, however, is a different story, or at least it was when I drove it about 15 years ago. It's only 60 miles, but it took us (and we're aggressive drivers!) three hours to go just one way. It's a pretty drive, but the stress of driving diminished the enjoyment of the views somewhat. I also personally found the stuff at the end of the road--specifically the Kennicott copper mine ruins--uninspiring and not worth the effort to reach them (although I may have heard recently that the boarded-up buildings may be more accessible, officially or unofficially, now than they were when I was there). The road may have been improved slightly since I was there, but my gut doubts that. More Wikitravel links that may help you: McCarthy and Wrangell-St. Elias NP&P.

I'd personally skip that drive and opt for the safer and more awe-inspiring trip over Thompson Pass to Valdez. If you ask me, that's one of the most beautiful stretches of highway anywhere in the world.

Most of the roadside outside the major cities of Anchorage and Fairbanks is extremely remote. I wouldn't necessarily be concerned about robberies when the nearest settlement--even the nearest gas station--is 50 or 150 miles away, but things can happen on lonely roads that would still make me leery of parking overnight. I've never driven an RV, though, so I have no real experience or words of wisdom to offer you in that area.

As to the glacier landing, I'm thinking your best bet would be from Talkeetna, which may dovetail perfectly with your plan to not drive all the way to Denali your first day, since there are many activities to do there (including a fun trip up a river). Talkeetna Air Taxi, K2 Aviation and Talkeetna Aero Services, the main operators out of Talkeetna, both do glacier landings. Other flightseeing tours are available from Denali (Era Helicopters' glacier tour [though check where it leaves from--I think I've seen an Era Helicopters base along the Parks Highway a bit north of Talkeetna, which is not close to the Denali park entrance], Fly Denali, Denali Air [no glacier landing option]), Anchorage (Rust's Flying Service [no glacier landing option]), and Girdwood (Alpine Air Alaska).

Last, we've discussed the subject of what to see and do when driving around Alaska in several different situations. Check out this post, in which I've linked to many threads I've found have good discussion of the subject. And don't forget your Milepost!

Sounds like you've got a great trip planned. You'll enjoy it thoroughly and will leave wanting to come back and experience the neverending magic that is Alaska! Safe travels...and say hi when you come up!