Just spotted this one on the PA Wilds website and plan to go tomorrow. It's at the intersection of PA287 and PA414, between Jersoy Shore and Wellsboro. I called them up for info.
The cost is $3.00.... and I'll assume free parking
They estimate about 70-75 tables, but the lady wasn't sure.
I usually have better luck finding deals at the shows of this size. If anything, it's nice to have a smaller crowd and not get raped for food.
Info below:

Gun Show
March 12-13

Buy, sell & trade at this annual show. Breakfast and lunch are served.

9:00-5:00 on Saturday; 9:00-4:00 Sunday.

Location: Morris Township Fire Company.

For more information call 570-353-7671