Hot Dogs- consider doing bun size Polish sausages or at least all beef kosher dogs. Have a crockpot of tofu pups/ vegetarian dogs for any non meat eaters. Plan 2 per person
See if you can find pretzel rolls locally, very very tasty.
Do a topping bar, separate from the main serving area.Make coney sauce and/or hot dog chili, recipes are here:
www.ellenskitchen. com/forum/messages/43504.html
3-4 gallons fine cole slaw
2-3 kinds of mustard
2 quarts sport peppers or jalapenos
3-4 quarts pickle relish
katsup
salsa, chopped tomatoes, etc

Meatless Pasta Dish (probably mostaccioli), for 150, 12-15 pounds dry pasta. Mac and cheese would also be a fine choice
Baked Beans- 4 1/2 gallons, 6 #10 cans
Corn 28 pounds- could also do a cold corn salad/relish, about 4 gallons
Salad, use plan for 100 page, 1 1/2 times the amounts
Potato Salad- about 5 gallons
Pickles- 1 1/2 gallons assorted
Raw Veggies & Dip- use veggie tray page
Potato Chips- 1 pound per 12, 1 pint dip salsa per pound
consider adding fruit trays with plenty of watermelon, see the fruit tray page

Lemonade? Beer? See beverage page, also advice on napkins, plates, etc.