
Advertising is mainly naughtynightlife.com (take a look and see how many of the summer ladies are still here - and keep in mind that last winter there were only two platinum advertisers on there). Backpage is active too, but has never panned out for me. There's a forum on usasexguide where hobbyists post some very limited reviews.
The main thing to keep in mind is that there's a really heavy LE presence here with intermittent federal involvement. Be sure to check providerbuzz. Also a lot of guys aren't really familiar with the hobby and don't want to be screened.
You probably want to go to Anchorage and then make a short trip to Fairbanks. Let me know when you're coming, I'd love to show you around if I'm in town!