So we are switching my 2.5 year old to a toddler bed. He has never tried to climb out of his crib and we shut the door to his room at night.

I anticipate potty training in the next few months, and our upstairs layout is our room, his room, bathroom and then the stairs to the main level. My thought was to leave his door open with access to the bathroom and baby gate the stairs, but DH is putting up major resistance for some reason and instead wants to put top latches on the doors downstairs to just be sure he can't get outside if he wanders at night.

What did you do at this stage? I'm open to all suggestions.