So ... we went to Biddulph Grange Gardens for the afternoon, through the tunnels, following the paths to rocky viewpoints, eating cake.
The sun shone all day, and we assumed Sunday would be dry.
The first band we wanted to see on Sunday was billed for two o'clock, so after an early lunch we headed to the festival. One look at the muddy car park made us decide to leave and go down the road to visit Chatsworth. I'm too old to have to push the car out of mud!
The house itself was a little busy but the grounds are so extensive that it's easy to get away from crowds - and, importantly last weekend, all the paths are graveled and free from mud.