How do I find the best GPS for mountian riding on horse back to document campsites?

meg_fire21 asked: I am an avid mountian horse back rider and am interested in purchasing a handheld GPS. I don’t even know where to start. I am looking to use it to mark campsites that aren’t necessarily well known to others and also where people have been who have left all their trash and belonging because they were too lazy to pick it up. How does gps work anyways. Can you mark your own spots and name them? Do you have to have... [Read More...]