Volunteering is a great Idea if you plan it in advance, you have a great time help out at an event, usually get free food
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Like Brandon said find out who's going to what competition and see if you can find a place to stay or whatever, I have hosted FIRST people at my house and it is always open to anyone FIRSTer passing through Delaware. Just remember that if you plan to drive somewhere for a long distance to schedule time for anything unexpected, traffic or car problems or anything. Also if you don't volunteer at the even bring a camera and take lots and lots of pictures of everyone and every team because some teams only bring a limited number of people to the event they might not be able to capture somethings they want.
Be sure to swing by for the Duel On The Delaware in October of 2007!