If you have always liked craft fairs, and feel you might like to try one at some time, I would encourage you to have a go, and perhaps this information may be of help to you.
DO YOUR HOMEWORK
To begin with, do check out the fair you intend to try for. I looked at local fairs only, because I knew it would be tiring and did not want a long journey on top of everything else I had to do. I went to visit three local fairs, to see what kinds of goods were being sold.
YOUR PRODUCTS AND PRICING
You need to be sure that your products will "work" with everyone else's - ideally, it would be good to have as little competition as possible, but more than that, make sure that the price range is appropriate too. I could be wrong, but I feel there is little point in trying to sell expensive paintings when everyone else is selling soap and greetings cards.
The first fair I visited, in a church hall, was all soap, greetings cards, and rather cheap jewellery. I sensed I would be out of place there.
The one I liked was held in a massive ancient renovated barn with stalls both inside and out, food items outdoors and a kiddies' area.
There was music playing, and an enormous variety of products for sale, including a few stalls selling beautifully made ceramics, lovely woodcrafts and real silver jewellery. I felt that my enamelled copper pieces would fit in well, and the organiser agreed. So, I became a craftsy person for a weekend.
BEFORE THE EVENT
Find out the size of the table you will be given (and the cost of course). Try, at home, to work out how to display your goods. Height is the way to go, if you only have one table. Some kind of shelf unit will be helpful. I made one - a shelf with four legs, so that I could display goods on the shelf, and on the table below. I also was lucky enough to have a perspex cabinet which you can see on the right here.
I learned quite a lot. One thing became apparent quite quickly. A craft fair is not quite the same as a proper ART and craft fair. The expectation, from the visitors, is bargain prices, and fun items. I did sell quite a few of my bowls, I am pleased to say - but in general, I quickly became aware that visitors were mostly looking for cheap and cheerful Christmas gifts. The same thing cannot be said of a major ART fair, I visit a huge one every summer called "Art in Action", artists not only sell their wares, they demonstrate too. The expectation from the visitors is quite different. Visitors expect to find quality art items, and are prepared to pay high prices for unique pieces. Having said this....major art fairs of this kind are expensive for the exhibitor to attend; smaller craft fairs are priced quite differently, at minimal cost for a table.
MANAGE YOUR OWN EXPECTATIONS
So - provided you manage your expectations, you can have a lot of fun. Remember the saying...."he who expects little is seldom disappointed". The girl behind me sold almost nothing, despite the vast attendance. It can happen, she said - she was fairly philosophical about it whereas I would have been devastated. But she knew that no two weeks are the same.
Prepare well, keep your expectations in check, and have a great time. I did.