Welcome to Boardworld, Stockee!
Just a few things to keep in mind:
1. Travelling from resort to resort wastes days. That means less riding.
2. You have friends in Whistler and it's one of the best resorts in North America.
3. Whistler is a two hour bus ride from Vancouver. No wasted days.
4. There is more terrain on Whistler and Blackcomb than you could possibly see in a whole season.
My point is, why are you going to Banff? I know it's great over there but if snowboarding as much as possible is your priority, why waste days travelling? Keep it simple, save money (on travel and lift passes), stay with your friends, and ride the awesomeness that is Whistler Blackcomb. It's so easy to pop over to Vancouver for an evening hockey game, you won't even miss a day on the snow.