Is wicheda sorta East of Bear Lake? I heard many good things about it but never took the Long walk in.
Maybe you could ride your bike all the way in?
A friend of mine Brian Smith wrote called Fly Fishing BC's Interior. He lives in PG and the book is a great reference for fishing spots, bugs and information.
Polar Coachman Flyfishing Club was also a great source to learn about the area. I was new to flyfishing and learnt a bunch from those people.
I didn't own my KLR back then but I borrowed my buddies Honda and rode around the Blackwater country.
Next year I may have to load my camping gear, fly rod on my bike and head that way. Last time I was out there the bug kill had changed that environment in a big way!