Hi Chloe!
I've tent camped at the Fort and didn't have any issues. Didn't have an AC. Having said that, I kept my most valuable possessions locked in the car when I went to the parks. Keep my cooler, chair, stove inside the tent while gone and they were fine. That was several years ago, but when I was at the Fort in June I noticed lots of people leaving their stuff outside of their tents and RVs without any problems. Not saying that things don't grow legs and wander off but that seems to be the exception rather than the rule.
have fun!