Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Most of the hike will take place throughout western Canada (in the 'rough' Rockies).
Wish I was tagging along...
You don't really want go into bear country with somebody that much younger. He wouldn't have to outrun the griz, only you. :)