Thanks for the replies.
Still hoping to hear something definitive regarding how non-dealer tableholders deal with the sales tax issue, since that seems to be a big sticking point regarding York. Is York being selectively enforced, or do private individuals at Allentown go ahead and fill out the paperwork?
In the state where I live, the tax authorities don't mess with private individuals who might sell a few thousand dollars worth of used stuff at swap meets a couple times a year - it's just not worth their time to pursue it unless someone is blatantly abusing it. I consider myself fortunate.