<p>As a follow up...there are several Navajo guides with small kiosks in the View Hotel parking lot. I strongly recommend that you make a reservation several weeks and not to wait until the last minute, especially if you want an extended tour. And, email to follow up a few days before your trip to confirm. Finally, one guide, "Fred," may try to get you to drive your vehicle while he guides you. Don't go for it---the guide fee includes them driving their vehicle (and therefore taking the risk of damage).<br>
And yes, unless you are content to be confined to the 17 mile public loop, you need an approved guide to see the rest of the park. (And you'd need several days to see it all.)</p>