I would be good with stuffed burgers, pepperjack cheese, muenster cheese, colby jack etc. Brats are great also, I enjoy even the chicken ones that have a sweet chipotle flavor. Italian pasta salad with all kinds of veggies, chunks of salami and cheese, cucumber salad, sweet potato salad, chips, watermelon or fruit salad, several different baked pies, jello, and homemade cookies.
Love the dunk tank idea. It wouldn't bother to be the dunkee. Horse shoes are a must, fishing, badminton, white elephant bingo,pie eating contest, 3 legged race, mud tug of war, whiffle ball and volleyball.