We were planning to put dd and ds in bunk beds - dd (4) on top - but she has started occasionally sleep walking. Didn't realise it was that but have googled and it seems it is. She wanders into the living room disorientated and agitated but not conscious or communicative. I take her back to bed, get her to lie down and she's straight back to sleep.
I had assumed this meant bunk beds weren't safe but have since read that sleepwalkers sometimes do very complex things in their sleep so maybe she'd be alright(!) she hasn't done it for a few weeks.
I'll probably stick to safe over sorry but just interested to hear other experiences. It's a shame because we have little space and bunkbeds would have helped a lot.