Well, let's see, there are festivals at Hutton-le-Hole, Helmsley, Beverley, Pickering, Whitby, Saltburn, Filey..... the obvious gap in the market is Scarborough. Why not have a beach festival - it would be easy; all the facilities are there, no need for any marquees or other structures, just maybe a big bonfire. Everything gets cleared away when the tide comes in and when it goes out you just carry on. Hey, you could even have the main stage floating offshore - maybe hire a redundant oil rig.

Just make sure that you put it on at the same time as one or more of the other festivals listed, then you're sure of attracting plenty of publicity.