Jason and I almost bailed on the trip when we realized that there was literally no leg room in the back seat of the jeep, and that we would be in it for almost 12 hours on bumpy roads.  Needless to say, we all switched out of the cramped back seat on a regular basis since none of us could handle it for very long.  It's actually way worse then it looks.  One girl said "she felt like she aged 20 years" after a two hour stint in the back.