HI Pete
All the best with it, hope you have lots of shows. Personally I do not go to shows, not because they are not worth it, just not what I choose to do.
Liz however goes once a year to a large Christmas show at a public school, the sort that the royals use to send their children to, as a result they not only sell lots of interior items but the main part is they get lots of business from it. There was one chap there last year selling long baguette boards, you know, the ones that you carry a hot baguette out on in the summer to the table, they were priced between £80-£120 about 20, x 6 x 1 inches, beech, maple, with a simple handle on the end. he sold out in the first day.
Obviously the better shows are more expensive, but you get people that are more likely to spend than some of the smaller shows. Either way I wish you all the best with it.