Hope you have some luck getting the karts back. Having a close-knit community like exists in quarter midgets should help. I've always been impressed on how these groups are much like one big family.
At least, the trailer and some parts were recovered.
I was at Dave Dayton's Auction and Trade Show three or so years ago when a vendor's trailer, and almost all of his product, was stolen from the hotel parking lot.
I'm amazed this kind of thing doesn't happen more often. Remember a couple of years ago when one of the NASCAR's show cars was stolen somewhere over in Ohio while parked at a hotel.
Jim Morrison