Powder mountain snowmobile club facebook and website, she shreds.ca ride reports, pemberton snowmobile club.
It is strange that these are the best snowmobile areas in the world and there is not much info.
Probably because the locals would prefer it not becoming another revy
"Nothing to see here, you're better off in Revelstoke or Golden."
I'd say the majority of the local snowmobilers started off skiing or snowboarding as well. The tourism industry locally is pretty much at capacity (sold out lodging throughout a lot of the winter months etc) with the ski resort, so there isn't a big push to draw in more visitors. Not to mention, we have 2 skidoo dealers within 100km of each other and most of the time they are backed up with work 2+ weeks already.
Your best bet is to hire a guide, we have many different people offering guiding to different tenures around here. It'll make for the best experience by far.