You wont actually be able to land in Banff, it's in a National Park and the local regs say no landings in the Park. You can however land in Canmore, a town located 13 km from Banff.
Call these guys
http://alpinehelicopter.com/home.html , they operate about 15 Bell 212's for heli skiing and several 407's for rescue and sightseeing.