I'm really debating the whole Cups thing on the CSL given the inclement weather we so often get, although this year has proven to be a fine year for Cups!
It was just as much fun (perhaps even more!) on a torrential half day at Snetterton on PZero Neros (I'd normally run PS2s) as I had on Cups when it was dry.
But yes, Caterfields are massive fun.