I can't recommend this company more. We were traveling end of August/early September. Got lucky with the weather. 60's and sunny. Six in our group - 2 of us rode ATVs (single seat), and 4 doubled up in the 2-seaters. It was an absolute blast!
Our guides, Clay, Chris, and Jeremy were fantastic! Kept the ride at a fun pace. Everyone was comfortable and having fun. We made 3 or so stops for pictures, chatting, etc. Beautiful views! The guys were great about answering any questions we had...just very personable and friendly.
They took great care of us, and I felt completely safe the entire trip. It was the highlight of the Denali part of our adventure...well, that and the rainbow that morning. And seeing Denali. And getting close to a moose hiking that afternoon. WOW, Alaska was cool. LOL
If you get a chance to take one of these tours, I say go for it! You won't be sorry at all!