Hey Andrew,
My vote is Banff. There is great snowkiting near Canmore at Spray Lakes http://www.rockymountainkiting.com/maps.htm. Nothing is crowded - often the only person during the week.
If there is no wind you have your choice of great ski areas. You will need a car to get to Spray, but they have buses from Banff to all the ski areas. There are kiting areas out-of-bounds at Sunshine and Lake Louise but you need a buddy who knows the areas (I don't) and they are in a National Park so the Park Rangers might tell you to pack it up.
Bill