As I said in earlier posts, I'm working to get us a tent with a 'door' or frame large enough so we don't have to angle tent stakes to get the trucks in and out. I enjoyed doing that as much as everyone else, but it's an easy aspect to fix.
It's not a terrible idea. But even with 4-5 trucks, and all those people, we're gonna need a fairly large tent. Also, there's probably a rental charge for tables, and we might need to upgrade to to the Swap Meet/Vendor area if we do something like that.
August sun is no joke when it comes to heat here, and with a black vehicle (like many have), a little shade goes a LONG way. Won't it be funny to see NowWhat in all his rain gear sweating his ballz off as we enjoy the cool shade of the tent?

"
Better keep that stuff on, Mike. It's gonna rain any minute now...."
I paid almost $200 and spent Sat. and Sun. with my truck in the cool shade of the tent.
That was with only about 15 people, and a few who flaked out (so those of us who did get tent space got to pick up the slack).
I agree that it's nice to have trucks out in the open area in front of the tent showcasing and 'announcing' our area, but I also believe that the majority will want to be under the tent.