I’d probably choose one or the other out of Vancouver Island and Jasper/Banff rather than trying to do both in the one trip.
Accommodation wise we camped for the most part, but we stayed in an Otentik just outside Jasper which was nice, i’m presuming if you were looking at RVs you’re not looking for super luxury accommodation.
20170530_165345 by Elizabeth Gomm[/url], on Flickr
Eagle wing tours for whale watching on Vancouver Island, bear watching out of Tofino is great too.
Canoeing on Maligne Lake if at Jasper. We also really liked Wells Gray and there are lots of canoe camping options there.
Photos from recent trip