Cook
The following is typical for a weekend "car" campout:
Check [here] for the current Troop food inventory.
Be sure to read the [First Class cook requirements] in your handbook.
I suggest having each person attending plan and bring his own Saturday-morning breakfast (to satisfy the [Second Class requirement] of planning your own breakfast and cooking over an open fire). Find out whether fire rings are available (for example, at Uvas Canyon Park the Youth Group Area does not), then list what they will be able to use. Over the fire you can include a grill, and you can also include the griddle if there is one in the patrol box you are taking along.
Then plan Saturday lunch; make sure all the food groups are included as the requirements dictate. Same for Saturday dinner and Sunday breakfast. Sunday breakfast is usually quick-to-clean, but doesn't have to be.
For all four meals, assign a (different) Fire Warden. For the three meals that you planned, assign Scouts to be assistant cooks and on clean-up. You will be directing them; the adults will make sure they listen to you. So you will do some cooking and some cleaning up, too. But make sure they all have equal turns cooking and cleaning. (You will probably have more assistant cooks and clean-up guys for dinner since that is a bigger meal.)
You will not be able to assign duties until just before the campout. But the menu can be planned in advance and presented to those who are going or considering going.