Grocery store, Sam's Club or Costco?

We're doing a time share at Split Rock in July. We're driving up from South Carolina so we won't be able to take any cold foods with us and we'll have to do our shopping close to Lake Harmony.

What would be the best grocery store near Split Rock?

We know there is a Costco in Allentown and also Harrisburg, but it may not be worth it to stop there for just a week's trip.

Any advice on the are would be appreciated. We'll be there with grandchildren ages11 and 7