S.M.
If he can pull up the crib should be at the bottom no matter what. As for him being able to fall out, I think it depends mostly on his height. The bumpers only increase his height. I never used bumpers becasue of the SIDS risk, and I don't see why have the fall risk if it can be avoided. Frankly, who cares if his leg gets stuck. He will pull it out or cry for help or learn not to do it..