Just to add to the mix.
I did a trip in the car/hotel which was great but saw quite a few motorhomes on the trip. All from the same company heading out of Vancouver (cant remember the one but they had the same massive logo on the side).
If it were me and I’ve spent a lot of time around calgary – banff – revelstoke – golden etc
I’d set off from Vancouver, head out via Squamish, Whistler, Pemberton and drive the 200km back road (summer only!)toward kamloops (which is the most beautiful drive i’ve ever done) then head into the okanagan valley via vernon and kalowna – see if you can get to Nelson too as it is lovely. More scenery changes than banff area which although amazing get a bit samey after a while
Vancouver is infinately better than Calgary if you fancy spending time there, Banff is like blackpool for the rockies and not in my opinion particularly nice.
I’d certainly recomend thinking about car/hotel as well as its much easier, probably way cheaper but then the camp sites are really well set up too
Plum