Another little cell phone tip; instead of calling, send a text. Works on a lower powered transmission, and may make it out when a call cannot.
WHY would you have a 4x4 vehicle, take it offroad, and NOT be prepared for the occasional "campout"? My jeep has enough in it to keep me alive for a week, and I am rarely more than a mile from a hardball. A small daypack is all you need, with a sleeping bag thrown in! These types of stories really get under my skin...these type of people EXPECT to get rescued...and therefore do not prepare