You know, women are REALLY tired of hearing from men that we should lighten up, smile a little, be friendly, and just put up with them.
EVERY woman, from childhood onward, has experienced stares, groping, catcalls, harassment, assault, and threatened if not actual rape. Through universal experience, we have learned that this is default male behavior. Every interaction with men has the potential to turn dangerous. Even the nicest guys can turn out to be lying predators. Even our own fathers, stepfathers, and brothers can be dangerous.
If we're friendly, creepy males assume that's a sign of sexual interest. If we're unfriendly, they think that's a sign that we just want to be conquered. If we're strong, that must mean we're ballbreakers or witches or lesbians (and then they'll ask if they can watch, or join in). If we're weak, we may as well be fair game. If we're cursed with big breasts, we must be "easy." If we're not verified virgins, we must therefore be sluts and available to anyone who wants us.
Screw that.
EVERY woman has had "the talk" from her mother about being careful not to give out the "wrong signals" to lessen the risk that we'll be raped. To be careful how we dress, how we act, where we can and can't go, to be relatively "safe" from inappropriate male behavior. And that if "it" happens, it was probably our fault for being inadvertently seductive.
Some men get the talk from their dads about respecting women, not forcing themselves on women, not hitting or raping or killing women. A lot of other men either don't get the talk, or don't think it applies to them, or she was asking for it, or decide their urges are more important than than someone else's right to be left alone. Men believe they have the right to maim or kill a man who comes onto them sexually -- women get told we are the ones to blame if a man hits on us inappropriately.
EVERY woman has experienced this. EVERY woman has been blamed at some point for being victimized by male harassment. Men don't ever seem to be responsible or accountable for what they do.
I can hardly fault these women whose camp the OP invaded for responding with hostility. Whether the "I have a gun" response was appropriate I won't judge. The fact that they felt sufficiently threatened by OP's presence to respond this way was undoubtedly based on a lifetime of experience.
Dudes, grow some effing manners. Quit defending men whose behavior around other humans is anything other than respectful and non threatening. If you're truly one of those "nice guy" who would never, ever, impose yourself on random women just because there's a one-in-a-million chance you might get lucky, then call out your creepy friends when they creep on women. If it's not okay to treat your wife, your mother, or your daughter like that, don't treat other random women that way, and shut down your bro friends who think it's okay. If it is okay with you to treat women like that, I don't want you anywhere around me or any other women.
PS: I don't hate men. In fact, there have been a few that I really, really liked. But I will never fully trust any of them.