My girlfriend and I took this excursion and thoroughly enjoyed it! We weren't expecting a rough and tumble Jeep experience (we got that on the ATV tour...see other review) but still wanted to get off the beaten path. Our guide, Jeff, really made the tour fantastic!
The Denali highway is a minimum maintenance road that's off limits to rental cars and RVs due to its condition and remoteness. Therefore, this is the only way to see it unless you go against your rental contract. The wildlife can be sporadic. We had just missed the Caribou, which stick around through most of June. We did see lots of Moose. There is the possibility of Bears, which we did not see.
Jeff was a great guide! Very informative and throughout the entire tour he didn't repeat one fact or topic. I am not exactly sure how he kept moving from topic to topic without repeating anything! He also stops at various vantage points for amazing photos opportunities. Jeff will also take lots of photos with his camera so make sure to give him your email to get copies of them if you wish. They turn out great! We tipped him a extra because of all the photos he took!
This is a great trip if you want to get behind the wheel of Jeep and see some amazing scenery!