Personally I would stay away from traditional pasta as it is very time intensive to cook pasta for that many people. If pasta is something you really want, I'd go with a very fine pasta (like angel hair), or dehydrated pasta... otherwise you could be waiting a very very long time for the water to boil (been there, done that, almost starved).

You could do a hamburger stew/sloppy joe kind of dish with fresh veggies chopped up in it and good fresh bread.

MNS