One thing always makes me anxious about traveling — fear that I won’t sleep well on the road. I sleep best under very specific conditions. A dark, cool room is ideal. A little light is bearable, and I can usually remove enough bedclothes to adjust for a warmer room. (I’ve been known to yank a thick duvet out of its cover so I could use the cover like a top sheet.)
The one nighttime deal breaker for me is noise. I’ve even woken myself up because I can hear myself breathing!