This is my first time to the trade too, so I was wondering the same thing.

Since I'm bringing some stuff that roots really easily anyway, I was just going to bring some cuttings that will be wrapped in wet paper towels for people to have if they want. That's how the mint started in the backyard...from some little cuttings wrapped in wet paper towels..and it sure has grown!! So, I think it'll probably be OK to bring our cuttings in wet paper towels...

Ben