I went to a swap earlier this month in Maryland. It was hosted by the Mid-Atlantic Garden (MAG) members in the Germanville area (they called it the Black Hills Swap or the Cicada Swap). You could try posting your idea on their "Exchanges" list and see what kind of response you get (they like to get together and have already had two plant swaps this Spring), or you can wait until the Fall when they will probably have another swap.
Could you give me some more information on the MAG swap as I missed it this year and will definitely plan to attend next year, depending on the date. Thanks.
I missed the swap too my daughter was sick. It is more than an hour away for me but I do look forward to going. I am intereseted in organizing something more frequent closer to you near me in annapolis.