Can you cook onsite? If so, think finger-foods, like ABTs...they'd be a big hit...if you can't smoke onsite but have a good way to reheat them and keep the bacon crisp such as a grill over med/low heat, or in a pan in the "O" at 300* would work nicely as well.
A couple others that come to mind, which could all be reheated in a similar manner as described for the ABT's:
Hot Wings
Chix Legs
OK, I'm suffering from writers-block at the moment, or something...need some help folks!!! Any other takers??? Come on in and give it a shot...
Eric