I'm 5'9". Not a giant by any means. First, the beds are twin size, if that. That's simply not comfortable for an adult. To make matters worse, the beds are so close together that I could not sit up straight on the lower bunk bed. The "upper" bed was that close. I had booked it with the hope that our kids could each sleep in the bunk beds so my wife and I could sleep alone in the queen bed. I was actually concerned my kids would hit their head. I ended up pulling out the sofa bed and we divided the kids up!
IMO, I'd book 2 value rooms with an adjoining door.