That drive up to Jasper, plus the Icefields Parkway to Banff, then back to Kamloops along Highway 1 is amazing.
If you hit Jasper around sunset, you'll see moose, grizzly bears, goats/sheep, elk, and more.
Are you talking about the interior or the coast for a week+ of >85F weather? Abbotsford only averages 9-10 such days for an entire season. Not sure about the upper levels but at the surface the weather since June 1st has been very different than 1997.