There's no schedule posted yet ( http://texaspinball.com/tpf/events/events-pending/ ) so I don't know when I'd suggest a meet and greet. Friday evening is when it was held last year, iirc. I know the swap meet is early Saturday morning and the kids' tournament is normally around Saturday lunch time-ish.
I like the badge idea. We'll be walking around all weekend with the TPF badges anyways, I wonder if we could figure out a way to have one hang underneath it so that it would show visibly as well.