Updated to include experience from Z8 (note "dammits")

Drinks
  Water (2 gal per person)
  Juice (2 big containers)
  Soda (12x2 liter containers, various)
    Diet Coke dammit
    Coke Classic dammit
    Pepsi One dammit
    Others?

Breakfast
  Cereal (2x medium bags of something pedestrian)
  Milk (skim & whole, 2 x 1/2 gals each)
  Bread (white, wheat, 3 loaves each)
  Bisquick (lowfat if they got it)
  Sunflower seeds (roasted, unsalted, out of shell)
  Syrup (more than 1 oz per person dammit)
  English muffins (white, wheat, 2 doz total)
  Fruit (apples, oranges, cherries, grapes, raisins, etc)
  Eggs (1 doz)
  Grands (2 doz)
  Sausage (2 lbs)
  Biscuit gravy (6 bags)

Lunch fixins
  PB (Jif dammit, large)
  Jelly (Smucker's dammit, large)
  Deli meats (about 3-5 lbs, various types)
  Sliced cheese (about 2 lbs, various)
  Bag salad (4 big bags, not iceberg)
  Salad dressing (2 bottles, at least 1 low/no-fat)
  Frozen snackiepoofs (2 doz, various types)
  Prefab veggies
  Chips (12 bags of various)

Dinners
  #1- Brian's Bully Burritos (tm) (serves 12)
    5# lean ground beef
    5 large white or yellow onions
    5# fijoles refritos
    80 oz salsa (preferably pace medium, not chunky)
    40 oz Kraft 2% shredded mexican four cheese blend (5 x 8oz pkgs)
    40 10" flour tortillas
    16 oz sour cream
    1 can japaleenies
    Guacamole, pre-fab or
      4 avocados
      24 oz low/no-fat cottage cheese
      juice of 1 lime
      12 oz medium salsa - any brand
  #2- Bratwurst (2x attendees)
  #2- White onions (Attendees/3)
  #2- Hot dog buns (See bratwurst)
  #3- Chix breasts (1 per attendee)
  #3- Steaks (even pork, 1 per attendee)

Condiments
  Olive oil dammit
  Butter spray
  Cooking spray
  Margarine
  Mayonaisse (not Miracle Whip Free dammit)
  Miracle Whip Free  (:-0)
  Mustard
  Ketchup
  Salsa (Mrs. Renfro's Black Bean)
  Italian seasoning
  Creole seasoning
  Garlic
  Tabasco or similar
  Analgesics
    Alka-Seltzer
    Aspirin
    Tylenol
    Ibuprofen

Non-food necessities
  Air fresheners (2 plug ins)
  Paper towels (8 rolls)
  Garbage bags
  Roasting pan (for bratwurst, optional)