Within a 15 minute walk, there will be the Lawrenceville Shopping Center. If I remember correctly, there is a Shop and Save grocery store. You should be able to use a consumer shopping cart to carry all of your groceries back up without dealing with the hill quite as much. If you have a rewards card, you would receive discounts which will also be beneficial. I do not know of the other stores, but I am sure there will be some variety available.