There is a book out: "How to Prospect in Alaska Without Getting Shot."
I bought it and still use it because it covers all the roadways and where to prospect without any hastles.
Also there is the Alaska Mining and Diving web page.
http://www.akmining.com/boating.htmLots of information there.
Tom and Perry Massie run the Cripple River Mining Camp out of Nome.
Do an internet search: gold + Alaska and see what you find. Lot of reading.