Be careful out there. There are some bad people

Uh, maybe she really was "an overly friendly older woman looking for company". Maybe your paranoia got the better of you in this instance. Honestly, it doesn't sound like a bad experience, just perhaps an annoying one.

I'll have to say I don't blame the campground for not giving you a refund. You didn't have a real reason for pulling up stakes and leaving other than fear, baseless or otherwise.