This is exactly what happened to the leader of the Solstice Celebration group that formed for a while in Hampshire (UK)back in the '90s She managed to get lost in
Kingley Vale . The rest of the group got rather excited but, as I pointed out:
"This is not only England, but
southern England. She'll go four miles max before running into a village, pub, or telephone box. She'll call us and someone can go and pick her up"
I was right and she turned up safe, well, and embarrassed two hours later. After that I got her one of those little compasses that fit on a watch strap, I think she still has it.