Tazzz, I fished the Gulkana years ago and had a great trip. My buddy and I floated the river late June early July with an inflateable Avon rented from U-haul. It was a easy float. Never saw a motorized boat above the highway. We used drift gear with med-heavy poles and large corkies with eggs. Thirty pound test leaders and twenty pound main line worked for us. Kings all day and night. My largest was fifty and my buddy's forty five. You'll find the kings in the deep head of the pool. Hope this helps.