To the contrary FO, there are a lot of cabins on the island. However, many are rented at least a year in advance.
I have a friend that is building cabins in the Thorne Bay area. He will have the first completed by the end of the month. Might give him a call. Roger Longbotham 1-307-460-0498. Also try craigalaskacabins.com as well as knamichaels.wix.com/hollis-creek.
We do have a Prince of Wales Chamber of Commerace at
www.princeofwalescoc.org Their 2016 visitors guide is out, and has many cabins listed, which you can also see on their web.