Luckily I won't have to do them all the time. I did one last night, it was a very low-needs setting, I was mainly there as an extra body just in case so it was mainly sitting on a (very hard, plastic) chair all night. Completed around 1 hour of work out of 11.
I knew it would get a bit chilly but I was shivering, no blankets available, I know your body temp drops during the night but it was awful.
Needing the toilet every hour, I don't know what that was about but it was very unpleasant.
Skin just felt horrendous.
I came home, slept for 7 hours today (like I would have done had I been off work) so plenty of sleep but still feel quite weary and groggy, no energy to do much else!
I know many people who do 4-5 nights a week, I don't know how they cope but I suppose you get used to it.
I did get a short break but found it hard to sleep because it was so cold and the uncomfortable chair, so I'd get 5 mins of sleep here and there.
Does anybody else do them and how do you manage them?