Drive north from ANC to mile 67 on the parks highway (Deshka Landing)
Jet down the Big Su about 30mi.
Turn right on the Yentna and go up another 35 to the mouth of Lake Creek.
The greenheads will be raging through there in the last two weeks of july.
Most kings will be at least half way up Lake Creek by the 15th though.
Try to go around the 20th.
I have hooked up on 3 out of the 5 samonoids on that time (nook,greenhead,pink) not to mention football size bows!
If your boat buddy doesn't want to go that far, check out the mainstems and tribs in the area, like Big Susitna, little Su, Talkeetna, Deshka, etc. Anywhere in the valley.
Of all the bush rivers avail. Lake Creek is the BEST in the Matsu. valley.
My cousin and I flyout yearly to Chelatna lake and float it (54 mi) on a 16'cataraft 5-7 days.
This my friend is pure pu$$y of a fishermans river!!
I'll be stuck this year down on the kenai in funny river during the dates you mentioned.
Will make a bush trip (not G.T. Charlies) from there this time though.
Aniakchak river!!