I spent the last week on a disrupted schedule attending training events - in a different time zone than is "home'. Let's just call it a "vacation".
It's always invigorating (and maybe relaxing too) to be away from home and experience new things...but the disrupted sleep is maybe not so nice. Between a new bed, sheets, pillows, unfamiliar noises, strangers' voices in the hallways, different lighting (despite the fact that the hotel had blackout blinds), unfamiliar smells, and a time zone change or two, disrupted sleep is a given!
It's not that those sensations are truly uncomfortable or that no-one could sleep under those circumstances. The locals clearly must sleep under those circumstances.
No, it's not the sensations.
It's the CHANGE in sensations that makes it most uncomfortable for sleep to be truly restful.
This is another reason that sleep routines need to be ... well ... routines! Applied, followed, and practiced consistently with the same pacing, location and activities (calming ones!)
I'm a grown adult and despite all I know about sleep and bedtime routines (and despite regularly engaging in best practices for sleep), I am tired and it is likely to take me more than a couple of days to be fully back to sleeping normally again.
Imagine what that would be like for our kids!