Adding bolt locks to door, safe?

I moved into a new house and wanted to add bolt locks to all doors (like in hotel rooms) to use at night. I have 2 young kids (who don't randomly wander out alone). I was going to install them and then wondered if it could be a hazard in case we had a fire and had to escape, if the kids had to leave through a different door and might not be able to open those? What do you guys think? Unsafe of non-issue in your opinion?