If you do a search on the forum, you'll see that regardless of which lock you have, these things are not secure. The doors are filon sheeting over Styrofoam core. A big screw driver or crowbar is all it takes.
I'm not trying to downplay your parental concern, but better locks will not keep a determined child stealer (CS) out. I'm not even too sure about how many CS hang out around campgrounds. To date, I have not come across any, but my sample size may be too small.
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Chip Bruce, RPh
Kansas City, MO
2016 Impact 312
2017 Silverado 3500HD SRW