Multiple Campsites are available in both Banff and Jasper National Parks.In case you want to stay in hotel in Banff National Park, refer the following website http://www.banfflakelouise.com/Places-to-Stay
In addition to hotels in Banff you could find multiple hotels in Canmore which is 26 kms from Banff. For stay in Jasper National Park, you could choose from hotels in Jasper town as well as from Hinton which is 66 kms from Jasper.
Vancouver, BC
Where to stay