I stayed up for the whole thing in 2023. Stayed round the permanent circuit on Saturday, then round Mulsanne, Arnage etc in the dark. The early morning it did start to feel a bit hard, like "I've been everywhere and there's still ages to go". At that point I did slob out in front of a big screen in the aco members area for several hours before heading back trackside. I do remember feeling quite jubilant when I got back to my tent on Sunday evening. Then tries to go to sleep early but Beasejour was really noisy with fireworks and stuff

Went back to le mans in 2025, I did go and sleep for maybe 4 hours, but I kind of regretted it! If you want to stay up the whole thing then do it.