I can tell you who NOT to use. In '06 I took a fly out to Lake Creek with Regal Air Service out of Anchorage. The WORST guide, I've ever been around. He didn't help, wouldn't offer any flies, after lunch, he walked off and took a nap!
A guide I highly recommend for a float trip on the Kenai, if you choose to take one, is with Tom Murray www.driftfishalaska.com. Been with him a couple of times and he will put you on the fish!
Feel free to e-mail me if you need any info on the Kenai Peninsula area. Be glad to help.