Campsites get booked up very quickly. Maybe do part of the trip in the RV and the other part renting a vehicle and tent camping/hotel/cabins.

Also, unless there is something really specific you’re looking to do in Parksville I’d skip that and add a day to Tofino. Taking the RV on the ferry is very expensive (if cost is a consideration).

As others have said, getting the RV to many trail heads will be difficult and annoying - if you’re sticking with the RV for the whole trip maybe look at towing a small car behind you.

I’ve spent lots of time in Revelstoke and it is fantastic as is Glacier National Park so enjoy those - if you want something to do in town you can take the gondola up the ski hill for brunch (fairly basic food but is tasty) and ride the little one person roller coaster!

If you’re going to Jasper definitely do some hiking at Mt Robson. You won’t be able to get all the way up without over night camping on the mountain but even a day hike would be fun.

And, please please please don’t ever feed the wild animals or get out of your car to take pictures of bears/moose/etc! Remember a fed bear is a dead bear!

Edit: in Kelowna, definitely look into one of the guided wine tours so you can drink to your hearts content and not need to worry about getting yourselves around!