Full size pistol and like 3-4 mags. I want to be completely inconspicuous and extradite myself from the situation. Rifles are for fighting long term, pistols are for getting home to your rifle.
In this sort of scenario where you are without a vehicle, a carbine, metal water bottle, and lighter could likely make the difference between getting home and not. If you gotta walk 75 miles, it would be nice to shoot a couple rabbits along the way which is pretty difficult to do at 50 yards with a pistol.