We do... and attending shouldn't be a problem for you. We we're thinking about your backyard - burgers, brats, and a variety of beverages. Nothing too fancy, but fun for the whole family. You'll need prizes to hand out for - Biggest lift, Best Mods, and "Rusty, but Trusty" (I have multiple entries for the that one!)
Seriously- Welcome to the IA Chapter. Seems like a number of us have had busy lives lately... but there is a growing interest in mud /off-roading. As far as swap meets - there is a Buy/Sell/Trade forum to browse / post in.
What part of Iowa do you live in? There are most FTE'rs that can tell you more about what is going on near you.