In reply to Dave Todd:
Thanks for all your input folks! Looked at various ideas and finally ended up camping (and eating) at the 3 Pigeons Inn (
http://www.threepigeonsinn.co.uk/ ) - great food and beers plus a good (cheap and basic) campsite.
My first visit to Coed LLandegla on Saturday, didn't start riding 'till 4pm, but got around the red (19km) in about 75 mins so decided (after tea and cake) to go around red again but take in the black sections as well (21km) - a flowing blast from start to finish - all pretty mellow (even to a punter like me). Then zoomed to the pub, pitched tent and were at the bar by about 8:15. Good times!
Rode a natural trail in the Clwyds on Sunday. Nice to be out on the hills on the best weather day for many a wet week!