Any of these: http://tinyurl.com/yaaa9r3

Probably, yes. Assuming you left Vancouver, drove to Whistler, perhaps stopping along the way at Shannon Falls (http://www.env.gov.bc.ca/bcparks/exp...rkpgs/shannon/), had some lunch at Whistler Village and tromped around a little bit then drove to Kamloops.

If you chose to drive to Alberta NOT via Whistler, then I'd press on past Kamloops as it would likely be too early of a stop.

In my opinion, yes. It's more scenic than Highway 97. Another good (very scenic) route from Whistler to Jasper would be this one:

http://tinyurl.com/yfky23s

...but it will have fewer accommodations options than the Kamloops routing.