I used Sunsail out of Dubrovnik and I have friends who used Moorings out of Trogir. I've used Moorings in various other places and both companies run solid operations. Next time I sail in Croatia, I will go with the base in Trogir only because the islands further north are more interesting to me. Most companies also offer a one-way option which is nice because you don't have to back track and you can also plan it so you're always sailing downwind.

Charter companies ask for your sailing resume (assuming sailboat). They really don't care if you've won a transpac, but are primarily interested in how many nights you've slept on the hook (I assume the same is true if chartering a power boat). They want to know you're not going to damage the hull. Croatia does require (or at least it did a couple of years ago) a "sailors license". The US doesn't give such things so the way to get around this is to use a company such as Moorings or Sunsail, which will make you a license when you arrive. I originally was going to book with a Croatia-based company, but they didn't have a way of getting around the licensing requirement. If you're unsure of your abilities, the companies generally offer a skipper for $150 or so a day and you could have one for just one day. You basically just want to be comfortable setting a good anchor and with med mooring if you intend to dock any place.

Croatia is a very easy place to sail. Navigation is line of sight and there's very little tide change.

Cost depends on the size of the boat. An outboard for the dinghy is an add on. Do your own provisioning as it's much cheaper and convenient.

I only spent one night med-moored at a marina. That was at Korcula and it was quite expensive for Croatia - more than people I knew paid to rent an apartment there per night. The rest of the time I anchored, which was free and the islands were all well protected, and one night we stayed on a little dock owned by a restaurant (eat at the restaurant, park your boat for free).

Here are some photos ... midway through are so are some of the boat I chartered - a Jeanneau 37.
https://home.comcast.net/~rodhooper/Croatia%202004.htm

Also, here's an unfinished trip report. Post 19 (the last one) talks about picking up the boat and the first day and night out. We had some weather the first day, but it was beautiful after that. If you have any other questions, feel free to PM me.
http://www.flyertalk.com/forum/showt...2&page=1&pp=15