Just beware of mud - some festival sites can get very 'clarty'. At the Hardraw Gathering last year we got stuck and had to be towed out and also slid in a narrow entrance and tore a hole in the side of the caravan on a stone wall - didn't make much difference to our caravan as it's so old we just repaired it with some metal sheet and Plastic Padding. It's a good idea to get carvan insurance, though.

As a result we bought a 4x4 to tow it.