Unconventional driving routes in the interior? Interesting gravel/logging roads?

For this summer I have quite a bit more time to enjoy my trip from victoria to calgary and I want to try to drive across the province differently than I have before.

Are there any gravel or logging roads that can serve as alternative routes so we aren't just doing the usual hwy1/hwy3? Have a 4x4 pickup that can pretty much go anywhere.

Has anyone done gray creek pass in a truck recently?