9 would do it if you are fishing on the small streams like Kasilof, Ninilcik. Those fish are 15 to 30 pounds. Now if you are going to fish in July they are a bit bigger and these critters are tough. Get yourself a pair of track shoes. kidding of course.
The 9 is also good for the Reds. Now there is some action. I used to use a 5 wt. for Reds but at times I wish it was a bit bigger.
You should have fun up there. Lotsa bank fishing but sometimes you got to go look for them. fp