You also need 4 people managing the kitchen and about 10-12 out front to set up, serve, and clean up the party, and these will not be at the wedding because they need to be doing the food.

whole hog already. How big? They only serve about 1 person per pound. 1 cup table sauce per 5-6 people
chicken quarters, you need 1/4 per person who doesn't have pork, plus 1 piece (a quarter is 2 pieces) for each person who does have pork. Cut apart about 1/3 of the cooked chicken.
hot dogs for children- skip. Requires, buns, condiments. Kids will eat chicken!

You can do fine without hot sides.

pasta salad, 10 pounds dry pasta
potato salad, 70 pounds potatoes
cole slaw, 6 gallons

corn on the cob? skip- messy to eat and hard to cook or hold properly

Instead, do maybe 3 specialty salads, such as
corn and black bean salsa
marinated cucumbers
broccoli cauliflower
cherry tomatoes with fresh mozzarella and fresh basil
tabouli
3 or 4 bean salads
2 gallons of each per 100

fruit salad- do fruit trays, keep better, prettier to serve, and the leftovers are more useful. See the fruit tray page.

At least 12 pounds of good bread or rolls and 2 pounds butter for each 100.