Parking location!!!!!

Never been to Knebworth before. What a joke of system. No signs anywhere locating you to where to go. Everyone using satnav to take you up a road that wardens then tell you is shut. Everyone trying to turn round at same point. ‘Go to to junction 7’. No help when that isn’t signposted either and no signal to put into satnav. We didnt come via the a1 as we had an airbnb localish. Arghhhh 2 hours in traffic and prob ten mins from venue for most of that