I read the Apollo 11 Lunar Surface Journal during the anniversary back on July 20th, and one of the entries that stood out to me was a section called "Trying to Rest," which detailed a time between the end of the astronauts' moonwalk, but prior to when they needed to make preparations to liftoff from the Moon. A period of about 7 hours was scheduled for the astronauts to sleep, but
[Armstrong - "(The quality of the rest) was poor in my case."]
[Aldrin - "I'd say the same thing."]
In their technical debrief, Armstrong and Aldrin detailed some problems with their sleep environment- too cold, too bright, too noisy, but yeah, that they were also just too excited to sleep. (It does mention that most of the technical problems were worked out by Apollo 15, and the last few crews got decent sleep on the lunar surface. I'm still convinced that if it were me, I would have responded to planned rest periods with "HOUSTON, I CAN SLEEP WHEN I GET BACK FROM THE MOON, OVER.")