Actually I think the biggest hazzards from fairs are:
a) choking the life out of idiotic people who make daft comments
b) dying of boredom when nobody turns up
After a good night's sleep and your thoughts, it all seems quite simple now, bit tired last night. The boxes one is a good one, shall add that! No electrics on this occassion so it is just table cloth, boxes and falling busts! Just had our big extension lead PAC tested and certified for a big show we lent it to and then I went and broke the plug so it will have to be done again (dippy Lotti!).
I agree about some organisers needing to show us their risk assessments though!
Have to say that I have been quite lucky with organisers so far, either becuase they are friends or because they are small regular markets and I went to meet the organisers before starting there (apart from the Christmas markets but in all cases the organisers came round to say hello before we started to make sure all was OK!).. These agricultural shows will be a new ball game, but am only doing two little ones this year!
Thanks for all your help and hopefully this has been useful to others faced with the same thing for the first time (in a craft sense anyway).