good hearty meal for first night or two:

chop up a bunch of taters, onions, green peppers, and mushrooms into bite-sized chunks and mince some garlic.....  for meat, we've used spam before, but beef or chicken works very well...... chop up into bite sized chunks.....  have some salt and pepper handy....  (you can add whatever other veggies and spices you want, that's just a start)

use foil (a couple layers is preffered to prevent breakage and leakage)...... everyone can make their own packet and put whatever they want in it, seal it up tight, throw it on the grill and cook for about an hour or so, flipping once......  the taters should be browned when it's done......  keep the fire hot while yer cookin it.....

no dishes to do aside from personal bowls.....