Find out what restaurants are around as Con-food generally sucks. Who wants a crappy $5 hot-dog?
If you see someone in a costume composed mostly of duct tape and a Boba Fett mask, feel free to laugh without guilt, as everyone else is too.
If you are attacked by a large group of comic geeks after buying the coveted comic they wanted, find the leader and strike him in the nose. Then offer him individually packaged slices of cheese, and all will be well.