I fished those rivers the last two years in July. The Klutina was a raging mess both years. We had to drive 18 miles up the Klutina river "road"(I use that term very loosely) just to get to some descent water. All the charters were fishing from about mile 15 through 18. It looked pretty scary getting those boats on/off the trailers.
I think by the middle to end of July the Gulkana is pretty well done for kings.We went the third week in july two years ago and totally missed the kings. We went last year the first week in July and it was just the tail end of the run. The river was gin clear the day we got there last year. Then it rained 4 days straight and was blown out the rest of the week.
We caught all our kings on the klutina both years. But the river is going so fast you barely stand a chance landing them from the bank.(But boy is it a kick when you hook into a big one!) I have floated the gulkana one year and don't remember seeing any motors. I'm pretty sure there is a no combustion motor restriction, but I could be wrong.
We are going up this year from June 14-23. We are going to forget the Klutina for kings and try to hit the gulkana run instead. The fish are smaller, but they are brighter fish and a lot easier to land.
A good buddy of mine grew up in Glennallen, and his parents still live there. You can email me if you have any questions and I might be able to help you out.
davison.roofing@verizon.net
Good luck!