Well I remember at last years Gathering, there were plenty of guitars that were brought specifically for anyone to play. They even had sticky notes that said, "play me" on them. And they were decent guitars too. So I'm sure you'll be fine if you can't bring your own.
I think some of those guitars where Ascolies and were for sale but I could be wrong, my memories not as good as it used to be, but then it could have been all the Beer in Nashville.
Yes, Adele you are correct. Those were my guitars and they were guitars I was selling, but I didn't push them, just put them out and let people play them. If they found a player who wanted them I would have been glad to sell them. They all made the trip back home with me and have since found players to keep them busy. If I make the gathering in '11 I don't think I'll be taking extra guitars.