Bloody cold it was indeed last year!
You could go for the camping near Vale - relatively easy walk in, or go further out - just drive in, park your camper in the circuit car park and if you feel the need, leave the circuit, go to it and return to the circuit.
P
Mind you, unless you can get to park inside the circuit, anywhere you camp or park is going to be fair hike just for a cuppa!
MG Mark