I looked at their website and Facebook, but it don't give any specifics on space availability or price. Id hate to load all this up and drive for 2 days and not have a space. I have a ton of stuff .
Spaces/booths are a few hundred bucks. Don't wait til a few days ahead of the show to book, sometimes spaces sell out...
There's a consignment table for people who bring a drum or a set to sell.
There are buyers (like Rich King) who buy used hardware, in bulk if necessary.
If your prices are good you could go home with $....But if you want music store retail money for your gear, you may have better luck selling from home or through an online site? Customers like to dicker and lowball often, after all much of the stuff is used!
I've been displaying/selling/buying there for decades.