Hi,
I had a couple of years experience in the Dog Show
scene,
some time back, and found that sports halls (school, college
and stand-alone) tended to get used a lot....
Quite a few amateur radio rallies that I've attended have been held at such
venues, one (the Derby rally ISTR) even used to be held IN a school!
Might be worth talking to the organisers of such events?
TTFN - Pete.