BN in 2006. The Marshalls guided our 2 cars to an area, we pitched up and were happy with our lot.
This was about 8pm on the Thursday night. Went to pub , got back at about 2 promptly fell asleep.
Woke the following day (8 ish) to find that it would be slightly more difficult to get the cars out due to the proximity of the new arrivals. Not a big problem though, But it would have been very difficult to get a larger vehicle out such as a camper van.
Its not that easy finding your way back in the dark though as its quite featureless, just possibly alcohol may also make it more tricky.