No I don't show the bedrooms. My main playroom is upstairs and to walk there we walk past my son's bedroom. I don't make a point of showing it - we just walk past and I make sure it is clean.
I always have the door to my bedroom closed. I show only the area we eat, the backyard, and play areas/play room.
If someone asks where the children sleep I say that I put them each in bedrooms and if they want to know what they use - I show a play pen and a mat depending on the age.

In your shoes - I would not take them upstairs. It sounds like your set up is on the main floor so that is where I would stay. If they ask about nap areas then say that you put them in bedrooms upstairs and move into a convo about their child's nap routine. I doubt they would blatantly ask to see. Most people just go along with the pace you set.

Good luck with the interview