Basically that 
My DH is a bit of a classic car enthusiast, we go to a lot of car shows through the summer and I would like to start trading at these events. Id like to sell novelty items and novelty baked goods - sounds naff I know, its more for fun, and I know the market there - it would sell well I am sure.
But it will literally only be for the weekend shows through the summer, Is it possible to set a business up for this, or can I just do it without setting up? It seems like a lot of administration for a business when really I would just be a one man band market stall 5 times a year...
Can anyone help? TIA