My recommnedation would be to go to
www.outdoorsdirectory.com and do a search to locate info on your question. I would then post your question on the forums there since it is dedicated to Alaska hunting, fishing, and the gear required to successfully enjoy the state.
There will be many posts about POW Island. Here is one I found in a few moments of searching, though it doesn't specifically address your question:
http://forums.outdoorsdirectory.com...02&highlight=Prince+of+Wales+Island+Bear+Hunt
Don't be afraid to ask questions. On this forum, someone has usually been there, done that (usually many someones) and are willing to give up some good info, but obviously, not their "honey holes".
Here is another idea. There is a forum member named Gooch who owns/operates Coffman Cove. He provides lodging, food, boat or vehicle for a set price. Here is the link:
http://www.coffmancoveak.com/
The last I heard, I believe it was around $1500. I cannot remember if it is 5 or 7 days. I have heard good things about his operation, but have not personally hunted there.
Good luck and let us know what you end up doing/how you did when you finally do it.
Take care,
Garion