Lots of valid points made, it would seem to me that the "tent thing" is a problem well what ever you do it is always going to upset someone, personally if you leave it up to the exhibitors to do what they want then it goes some way to pleasing all. Even if you say U.S. vehicles here and British vehicles there you will still get people who have both so if you go with the flow and let people exhibit how the want to.
Don't forget the show is for the exhibitors as well as the public...
The most important things of all are to make everyone welcome, make everyone feel safe, if this is achieved they will enjoy themselves.
Site rules:
try to limit rules but the ones which are laid down MUST BE ENFORCED.
The most important ones are Site speed limit, No under-age people using motor/quad bikes or vehicles ( driving license ) at any time, No sirens or blue lights to be used outside of the arena displays only authorised emergency vehicles to be allowed to ues them.
Curfew at night for vehicle movements and noise ( music ) To be enforced or banned from site.
HELP POINTS or HELP PHONE NUMBERS.......
To be supplied to everyone who signs in to exhibit.
This will be manned 24 hrs a day for emergencies of any nature and to be acted on immediately.