I never eat prior to hunting just a couple of energy drinks for the drive. I always put biscuits in the oven while loading the truck. On a good day, I remember to take them out of the oven and throw them in the truck. That way we have something to nibble on when we are finished hunting. Wife always lets me know when I forget to take them out of the oven, that's the bad days!
Anytime I am travelling, I grab the extra roll of TP from the hotel and put it in my truck console. With 3 teenage boys hunting, camping, and fishing... you can never can have enough TP in the truck.