For the few I've done, snacks and booze are a personal expense, everyone brings what the want to get sick on. For the rest, I make a rough calculation for bread, butter, eggs, bacon and add a couple dollars to the total cost of the adventure. As for the main supper meals, (ice fishing adventures) I cook up a few LARGE meals that can be reheated on or in the oven. Lac St Jean Tourtiere is the #1 favourite, a great big pot of turkey soup/stew you can stand a fork in or a big pot of chicken and pork ragout with potatoes. If there's any leftovers, 12fotspringbok makes off with the Tourtiere pot, the rest I take back home.