We have double locks on all our doors because it takes a second for a child to "escape". Give yourself peace of mind and do the same. The locks we installed about a year ago are at the top of the doors, out of our son's reach. Let me share a little story.
We spent this past Thanksgiving at an un-childproofed house. Hubby, our nephew (16yrs old) and I were chatting while my son played. Everyone else was still in the dining room, out of view. I told them I was going to the bathroom and to watch our son. I was in there 2 minutes. I came out and asked where he was. They thought he went into the dining room. I quickly looked and he wasn't there. We looked outside and there he was. Thank God they have a huge yard and he was nowhere near the street. But the point is.......a million things could've happened. I was pissed at my hubby but moreso just so thankful my son was unharmed (luckily). I know there is no substitute for supervision but these double locks give me peace of mind for many reasons.
hope it all went well 
