I once stayed up for 30 hours straight, and done a few all nighters. I remember each time I went to sleep afterwards, I slept really badly and didn't have any dreams. Maybe because this was before I even knew of lucid dreaming, or whether that sleep deprivation is bad for lucid dreaming. I would put this to the test, but I don't really want to fuck up my dream journal and cycle, especially not now as two nights ago I was so close to getting lucid.