The Hess has 12pks of soda and water that are def cheaper than garden grocer. They also have beer, a couple cheap wines, chips, snack type stuff, like donuts and trail mix and chips. They have personal pizzas for around 5or 6 dollars, breakfast sandwiches for around 2 bucks, ,hot dogs, cans of soup and microwavable ramen type soup bowls, some single fruits, all cheaper than GG, or disney prices.
You could walk over and back, but if you need a lot of things, have someone go with you to help with the bags, or be ready to make two trips, or I wonder if you could call a cab? It sure would be a short ride.
I know they have a few canned items , but not sure if they have any frozen things.