I'd wait until the first two weeks of August. For several reasons....First, the bugs will be mostly done if not all done for the year. No black flies, mosquitoes, or other annoyances to deal with. Second, the height of the silver salmon (Coho) run is at that time. Less of the combat fishing you see for the King runs. Third, less folks up there at that time as it's at the end of the fishing season so getting on a charter is cheaper and a bit easier. Fourth, the temps top out at around 70 with the nights being 50's which makes for some glorious evenings around the fire. I've been up to Homer, AK a half dozen times and have used North Country Charters every time. I've heard Fox Charters are good as well. If you're stuck on going in July and going to be in the Homer area, send me a PM with your phone number and I'll call you as there's a ton of info I can give you on the fishing and other items in that area that I don't feel like typing. Good Luck and have fun!!!