As long as you turn around and go back the way you came, you should have no trouble in a S.U.V., pickup, or any other reasonably clearance vehicle, (Camry and minivan notwithstanding).
Most of the caches have a difficulty of 2, some a little harder, and some a lot easier. We did our best to include as many cachers in the area that we know. That being said, if we missed someone it was without malice. We just hope you have as much fun finding as we did placing them.