I am not a member but I went to the swap meet about two years ago. It's a fraction of the size of the GCCA swap meet and I did not find it as interesting or as much fun as the GCCA. I don't recall any plant sales people there at the time.
There should be a plant seller there at this next Oct 18 swap. If you are looking for the unusual plants then it's probably not for you. A lot of the really big sellers from out of state don't do this swap but the ones that are there tend to offer really good deals.