@Pablo - Don't give up yet. I shared your story with my wife Jane who happens to be British (she's from west London). Although your crash area is about 160 miles from our house, Jane wants to launch a rescue mission. "It would be a fun adventure!", she said.
I just have two concerns. The first is that this area is dangerous due to the proximity to Mexico. Mexico itself is great...we go all the time...but these border areas are used by armed drug traffickers, and due to that problem, local property owners who see people trespassing on their land have been known to shoot first and ask questions later. What can I say, it's the wild west out here.
My second and more practical concern is the size of that hill....do you really think it's climbable? I would hate to drive that far only to find the hill is 1,000 feet tall and impossible to climb. We are very happy off-roading in the Arizona desert, but rock climbing a vertical wall is probably out of the question.
If you think that hill could be reached easily enough, we might have to take a trip down this weekend.