Went this weekend and rented from Ehlers. Overall a very positive experience. Rented 2 4 Wheelers, both were Honda Ranchers, 350cc. Not the fastest thing on the trail but we had a blast. One unit had a pretty darn flat tire right from the get go, which bummed me out more than a little. Paying a significant number of Washingtons for a rental, I don't want to worry about that crap for the day. So I ended up having to drive the unit on the shoulder of the road up to the Mobil to fill up the tire.
Still, overall, I had a great day. I definitely see an irresponsible purchase of a 4 wheeler in my future.