[Snowtractor]

Most events carry blanket liability insurance. The very act of putting on an event makes you liable for your displays, vendors, roads , bathrooms etc etc. I would be suspect of an event that didn't carry any , though having your own may cover your ass. Myself ,I want to show the stuff off but if I have to have a six foot fence and security and my own insurance and transportation to the site ,etc. , screw it.
Sean