perchpsk, I'm in good shape on the xenia and GSP right now, thanks.
flux,
I use deli containers I get from Gordon Foods to pack the frags in. Some people use bags but I think that is more work. Package them up, put them in a cooler (heat packs in winter) and you are good to go. Some people set up a small aquarium w/ light to show the frags at the swap but most do not.
As far as getting what you think you are buying, basically you have to trust people. I've been to a number of these w/ good results in that respect, but you never know I guess. If that were to happen, word would spread quickly as this is a pretty tight community of hobbyists. The biggest problem I've had were some frags walking away once.