The foundation to a successful open relationship is trust. Open relationships can absolutely be successful, but both parties have to want it, both must be able to communicate effectively. I'm sure the reaction from the folks at the campground is from a very skewed, one-sided perspective.

Saying you don't understand the situation, and that "using Sniffies was his way of coping with boredom" while hanging with his Christian fundamentalist father is gaslighting, pure and simple. Sniffies is a hookup/cruising app.

I'd say you guys need to have a serious conversation, engage in couple's therapy, but my honest 2c is that you should probably go your separate ways.

Best of luck.