Charlie I’d say take a rest and come back in a couple of years, let’s try other parts of the country, and give yourself a break too, let someone else do the lifting.
Surrey would make a great venue riding wise, we have masses of trails and it’s perfect for SS, a bit more forested rolling XC than the big ups big downs of Purbeck. The problem I can’t find an answer for is this is stockbroker belt not an area that depends on tourism, so there is almost no camping.
BTW it’s a nice time for a family holiday for anyone with pre-school kids. We rented a house in Poole and after Monday had the beaches and attractions to ourselves.