>>1578259I slept in a cave once.
It was alright for keeping the wind and rain off but with no draft the place would fill with smoke and wake me up every half hour or so.
I ended up moving the fire closer to the entrance but that meant the heat just got lost out the entrance.
Lessons learnt:
>Uncomfortable hard ground generally>Find a spot that smoke won't build up in>beware of rodents and their related viruses and shit 
