Don't take this the wrong way but do you think you would have more fun running 1/10 instead of 1/18? I understand that you probably have alot of money invested in 18th scale and you might not want to make the switch, but I just think you might want to run 1/10 anyway. I ran my mini t up at Madness and on Wolcotts carpet track before they switched it to dirt. The carpet was fun but the dirt wasn't. The poor little truck got tossed around by ever little bump and didn't handle some of the larger jumps that were designed for 10th scale.
Another thing to keep in mind is that too many classes = no fun. We currently run 2wd,4wd,truck,slash,oval, and sportsman. And some idiot wants to start running vintage. If we try to add 18th to that we might end up with 2 drivers per class and 6 volunteer corner marshals for every race.
It's a free country and you are more then welcome to 18th scale (as long as you don't rip up the track too much), but I just wanted to give you some stuff to think about. Besides that, come down and HAVE FUN!