The party is potluck. I'll be firing up the grill, and will provide some basic meats and veggies, and some starting soda; you're encouraged but not required to contribute some food or beverage.
If the weather sucks, we will still have a party indoors, but I expect it to be a quieter and smaller affair of gaming and schmoozing. If it is not actively raining, though, we'll be outside.
RSVPs are encouraged if you're reasonably confident that you can make it, but if you don't get around to deciding until that morning, I still encourage you to come.
Hope to see you there!