BFF club? Sort of an exclusive group? Does this piggie from 2014 let me in? (Rifle is a 1903 Springfield in 450 Bushmaster.) .
. However, I'm having second thoughts about my application for admission:
Wikipedia: BFF is a phrase that describes a close friendship typical of teenage girls and young women. Such friendships are characterized by intimacy, trust, and a sense of permanence.
Urban dictionary: BFF has two definitions, the most common of which is Best Friends Forever; the other is the complete opposite and is Big Fat [bleep].
I suspect Campfire usage involves all of the above, perhaps simultaneously.