Marvin Martelly (.
Google
This place is definitely worth the hype! And I say that as someone who drove for over 3 hours from Cottonwood to Page. The tour was led by Sunny, a real Navajo man. He took our group to the area (which is on actual Navajo territory) via a van, and it was a slightly bumpy but fun, scenic ride. Throughout the tour, Sunny gave us lots of information about the history of the Navajo people and the canyon. He also helped all of us snag some superb photos and showed us some cool features inside. I don't want to reveal too much, but I'm sure you will enjoy the tour.
The price might seem a bit steep, but I think it's worth it. You are technically on their land, and they're being gracious enough to allow us into areas that only they have access to. Alongside the actual drive and the information provided on tour, your support goes directly to the people who maintain the canyon.
It could be a once in a lifetime experience for you. I say go for it!