We went to Hop Farm in 2011 and had a good time. We came out from London for Saturday. Getting back was a near disaster as Victoria Station was closing just as we got there. We almost got locked in. Then once we got out, we realized the Tube was closed as well. Getting a taxi took us over an hour as none were available and we were not familiar with which buses to get back to our hotel in Kensington. Our fault for not planning it all out better.
It seems like we'd have to rent a car, but I'd rather not get involved with learning all that and the traffic at Hop Farm. I know we can camp or stay in a Tee Pee, but we are not willing to do any of those. I was looking places to stay, but they all seem far away from the train station and probably not walkable at near midnight.