This isn't a huge issue in the countryside - this is one of the uses of medical helicopters, honestly. You are probably better off getting folks at the scene to help stablize you and allowing the helicopter to come there. That is, unless you were told to go somewhere else.

(I've nearly lost a tree for a medical helicopter when I lived by a overly dangerous curve: They decided to close the road and land there instead. They also help in rugged terrain).