OP here. And this is why I keep coming back to ehell! I really appreciate all the planning help -- you guys opened my eyes to some potential planning pitfalls. At this point, I don't know why I thought asking people to bring sides was a good idea.
I can totally imagine the party going like mj mentioned.....a headache for both guests and hostess.
Now I'm excited for the party! Will be doing a "hot dog bar" with various fixings, chips, fruit (watermelon and grapes), and veggie tray (celery, tomatoes, carrots, cucumbers) with hummus. Drinks bar with tea, lemonade, water, and beer/wine. Ice cream cones or popsicles and banana pudding for dessert (unless I get inspired by some other yummy dessert recipe).