I say LB ,
I hope you mean River Valley not Riverside?? The latter is a Chinese Takeaway in St Austell
Carnon Downs was a real adventure. Nearly every pitch was taken but hardly anyone there. Mostly empty seasonals. The toilet blocks are amongst the best I have used. Each block had a great christmas tree. Very pretty.
One day it reached minus 10 degs. A notice was chalked up at reception telling us to use gas NOT electric as they didn't want to overload their circuits. Odd that because the site occupancy was barely 15% and only 10 amps available. We had a blackout for 40 mins just before xmas but that was blamed on SW Electricty.
Otherwise everything was excellent. No mud at all because the ground was frozen solid. The recommended walk guides were excellent. We followed one on Cristmas day to the Punchbowl and Ladle Inn. A delightful dog friendly place. The first round was on the LandLord. That's real customer care! I confess we were knackered by the time we got back because the hills there and back are real roller coaster switcbacks. A very good time all round.