bush.
don't look for the tour that packs in the most stuff, in the least amount of time, for the least money. believe me, you underestimate the distances and overestimate the quality of the roads. you will spend so much more time in that bus than you expected.
go and search for tours on horse back or camel back if you want something different and really want to get away from the masses. try to get a seat on the mail plane. that's always a great one.
and if the main reason that you wanted to join a tour was that you felt it's to dangerous to go by yourself, then study this 