Howdy Pardner!
When I camp, I usually use a little bit of natural deterrant. I mark my territory.
There are times when you gotta go, so why not go outside your camp. Just circle the camp and mark your camp so that any bear will catch the scent and know that it's "your" territory while you're there?
We've camped in bear country without much incident, and all the men in our party would mark the territory around our camp in this natural way that critters relate to. It is what bears do, and big cats as well. Mark your territory and it will help discourage visitors in the night. First line of defense.
Obviously, the camp cleanup before bedtime is something you don't want to neglect, but you already know that so reaffirm your dedication to keeping critter bait at safe distance from camp.
Finally, I carry my .40 cal and haven't camped yet since I got my pistols. In this scenario, I believe I'd want my Judge loaded with .45 Colt longs under the pillow. I don't have kids either, but even if I did, I'd want my pistol in easy reach. I don't think a little kid would have the power to pull the trigger on the Judge, but if that was a concern, I could just as easily use my Ruger and keep the safety on. Even with the safety off, being a double/single action pistol, that first trigger pull requires a bit of determination.
Something harder to learn is how to sleep with a higher level of awareness. It can be done. Really! If you can learn to sleep lighter, so anything will easily awaken you, then that's a talent worth developing.
Finally, it doesn't hurt to have trip wires around the campsite with a bunch of empty cans or pots and pans to make a little noise if a critter comes along.
Blessings,
M-Taliesin