I heard that there is some awesome trout fishing in the lakes here uring the peak of the salmon runs. Everyone is so sucked into catching salmon that the lakes are empty with huge bows. That is usually june and july. September and October are good times for the Rainbows, probably the best times. That and right after ice up which is in like 4 months. I have only been here for a year and my biggest so far was a 20" rainbow. I have caught a few species of salmon, silver salmon, chum salmon, and pink salmon. Most of the Grayling fishing is further in the interior of the state. We have a few rivers that I know of which are between Anchorage and Fairbanks. I live in Wasilla and there is a few rivers around here that hold them. The little Su had Grayling and also Willow Creek has some. They have caught some very nice grayling and rainbows out of both. I am not to sure about hatches, Grayling take pretty much anything that a trout will. Caddis are around, some nymph activity...Troutbeads are another way to go. I built them a website if you want to check them out:
http://www.troutbeads.com They work very good. I have caught most of my trout on the beads. My 20" rainbow was caught on a prince nymph #12. A lot of people just use regular mon for leaders, around 5lb for trout is probably good. For Grayling I would suggest using some tapered leaders. Doesn't need to be floro. I would use a 5 weight at the least for the trout, maybe go a little lighter with the Grayling.
I think you would do fine without a guide, just hit some rivers along the parks hwy which is where I was talking about. Maybe we could meet up sometime. I am looking into being a guide here.