Exactly why *I* wouldn't take on the project, but I do know we signed a lengthy waiver at the track in NC and thankfully nothing went wrong for us...
It only takes one bad thing to ruin it though...some are willing to accept that risk, and some aren't. This guy has a track near Lake Gaston and as far as I know, it's been there for years and it's been a lucrative business venture for a long time. He has miles of tracks in both fields and in the woods, on high hillsides. Some of the track at the time was so intimidating, I wasn't willing to even venture near it. I'm not sure if he's still up and running, but I guess at the time, he'd been fortunate enough to never have anything horrible enough happen that cost him everything in a lawsuit.