Please go to the bigpots index page and scroll down about 1/2 way. There is a whole group of pages on planning for 100. You want the BBQ page, the salad page, the fruit tray page for the fruit salad. You will need 10 gallons total of side dishes, of which 4 to 4 1/2 should be potato salad, about 35 pounds of potatoes. 6 pounds dry uncooked macaroni for the pasta salad (rotini is easier to eat and to store, doesn't squish so easily). Be sure to read the food safety pages as well. Have fun.