Personally I carry a Titanium S&W 360PD J Frame.
It is a 5 shot revolver and is rated for .357mag, but I use 135 grain .38SPL +P rounds.
Being mostly constructed of Titanium this weapon is really light and portable. It is very reliable but won't group like a larger hand gun. The trade off you get for having a light and easy to tote BUG. The double action trigger is also a plus as it greatly reduces the chances of having an AD.
Anyone else packing some heat on the road or trail?
If so, what are you carrying?
I haven't tried running with a semi auto but with the right rig a Glock 19 may be possible or perhaps that new Glock 42? The only turn off of the 42 is the .380 cartridge may be to anemic, even by handgun caliber standards.