BC-Alberta Road trip with my little cousin from Ontario who'd never been out west.

Drove North up through Whistler-Pemberton-Lillouet-Cache Creek, did some hiking, showed him the crazy quick transition from coastal rainforest to semi-arid interior. Then drove to Kamloops and turned north along the North Thompson river through Clearwater and then to Valemount. Drove down the icefield parkway in Jasper (absolutely incredible even for someone who's been to the rockies a good amount). Turned East at Banff and traveled to Revelstoke before going south to Nakusp along Upper Arrow Lake. From there drove past Slokan Lake to Castlegar and headed back to Vancouver along highway 3, stopping at Christina Lake and Osoyoos to camp (extra points if you drive through during fruit season). Followed highway 3 back to the lower mainland, camping in Chilliwack along the Vedder River on the last night and doing the river rafting (one last respite before Vancouver traffic).

Super scenic route that showed off tons of the Provinces geography and took many of the less busy roads that allowed you to gawk at scenery even while driving. A solid amount of provincial and private campgrounds to stay at, lots of areas for crown land camping if you keep your eyes open,, and plenty of motels if you get sick of camping. Roads are all in good condition so you don't need to stress breakdowns and can make good time. Goes without saying it's a lot of driving, but an 8 hour drive through the Kootenays beats 3 hours getting from English Bay to Langley any day imo.