You have to visit the Icefields Parkway between Banff and Jasper. Take the tracked bus out onto the glacier tongue and have fun. Everytime I go out there I check out the date markers that show the receding face of the glacier. If you're rich, there are helo tours available.

Stay away from the touristy parts of downtown Banff - that's more for the rich Japanese and Germans. Most sane people can't afford the prices. However, downtown Jasper is a steal by comparison and a bit more laid back.

All kinds of great day hiking around Lake Loise, etc.

Interior of BC is great especially this time of year as the fruit gardens are just beginning to ripen!

Lock up all your food and smellables into your vehicle or bear locker. Trust me.

Take in some river rafting on the Fraser river @ Golden - they have full blown hard-core class 4/5 all day rides all the way down to calm half day family trips.

Pay attention to the possibility of wild life (sheep, elk, bears, etc.) on the roads especially near dawn and dusk.

Banff and Jasper tramways are excellent (if you want a heart attack, take the hike up to the Jasper tramhouse!)

Have FUN FUN FUN!

[BTW, Why do you drive on a parkway and park on a drive way???]