Well - another vote for Whistler from me. I still think it is world class and not because of the patios.

If visiting in the summer, I'd get a bike rental and bike on the trails (some are paved) from the village through the lost lake circuits, via Green Lake over to Rainbow Park (about 10 km riding). Take a picnic and spend the day. It's the location of the Ironman transition from water to biking and has stellar views.

Another great ride is from Function Junction to Cheamkus Lake. The trail ls not paved but not technical either. Bring bear bells (or spray).

If you are visiting from the UK, it won't be like the European Alps since the mountains are much shorter there by comparison. Hope you have a great trip.

Vancouver Island is nice, but there are less physical activites to do there for younger people. IT's not to say that you can't do them there, but you won't find zip lines, ATV tours or white water rafting with great frequency.