Let me share our approach: We've done this three times in a GV at Boardwalk. The key is PLANNING. We tackled this by:
1) Breakfast is easy, just create a shopping list of breakfast food items to shop for. Cereals, milk, juice, 5 dozen eggs, someone can precook at home 5 pounds of bacon and freeze in a couple of Tupperware containers to throw in their luggage as they leave for the airport.
2) Lunches are generally in the park but having bread, lunch meats and cheeses is a good idea in case of rain or even snack foods.
3) Create a draft daily dinner menu weeks before the trip and have all the families review it for modification to attempt to satisfy tastes. Once an acceptable menu is finalized, create a shopping list from it. This may also be a good time to discuss sharing the cooking responsibilities as usually every family has a favorite specialty they excel at preparing. One idea we came up with is to get a precooked spiral cut ham to heat up the first dinner, so the leftovers can be used for sandwiches and breakfast omelets.
4) While a online grocer can work, or even taking a taxi. We have rented a car for the first day to go over to the Super
Walmart over on Vineland. They also have a liquor store which makes shopping very convenient. Face it, shopping for 12 or more is massive. Having the shopping list created in the planning process streamlines the shopping.
5) The logistics of getting this planned is the easy part. Getting everyone to understand and work within the guidelines of the process can be troublesome. There needs to be a meeting in the planning process so that everyone IS together at dinner time. Everyone eating dinner at different times doesn't work well with warm food. There undoubtedly will be a shortage of flatware and cookware for the stragglers. Besides, how many people can hover over the stove warming up their food? A suggestion we use is to ask guests to return to the GV and use the pool for down time when the parks are usually most crowded, 2PM-5PM. This allows everyone to relax and unwind plus whoever is doing the cooking that night gets a chance to get started on things. While it may sound like a waste of time on the surface, on several occasions guests of ours have thanked us after the trip that having that down time made it feel like a real vacation. Besides, after dinner one can always return to the parks for more rides, fireworks and parades.
Just sharing our approach...........