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Depending on your location, a gun can be a good idea.
Whenever I'm in DEEP backcountry (Canada), I keep a shotgun on hand. Were it legal, I'd keep a large caliber handgun.
There is a very low chance of being attacked by anyone/anything, but if you ARE attacked, you are your own protection, just like you are your own paramedic and firefighter. Have the tools to do those jobs.