The best way to get there if you’re driving is to take the A414, then get off at a roundabout to the B195 (Welwyn Garden City). Follow the B195 and you’ll reach a Welwyn Garden City sign and 40 mph sign, go right at the roundabout (on to Sylvan Way), then straight on at the next, then straight on at the next, then right at the Moneyhole Playing Fields sign. Ample parking
If you’re coming up from the south (ie M25) you need to ignore the other roads saying Welwyn Garden City (like the A6129, A1000, A1 etc). B195 off the A414 is the way to go.
If you arrive by train give me a call in advance of when you’ll be arriving and I’ll come and pick you up.