Ride home from someone else... Would this include prior planning that should they be stuck at your house and have no supplies of their own that you now have to make a choice? Cut them off or include them into your food/water/waste provisions? Were they eleceted DD because they were one of the few people in the parking lot who had 4 wheel drive? If so how many people were they trying to drop off before or after they arrived at your house and could go no further? 1 guest becomes more.