For my input, Id look at a Ruger Alaskan Snub in .454/.45LC or .44magnum.
You can add a CT lasergrip too;
www.Crimsontrace.com .
A Taurus Judge or maybe a Smith & Wesson Gov revolver in .410 shotshell .45acp or .45 Long Colt.
That wheelgun could handle snakes hogs coyotes maybe bears.
I'd avoid the S&W model 29 or 629 .44magnums. They have the craptastic lawyer locks that so many gun owners & S&W purists despise.
The Ruger Super Redhawk is robust, strong & easy to maintain in the field.
For a anti-personnel round or protection, Id carry a .44spl like a Glaser Silver Safety Slug or maybe a MagSafe. DPX, Buffalo Bore, Speer Gold Dot offer great carry loads too. DO NOT use reloads or hand loads for concealed carry/defense.
Ammunition isn't cheap but a factory round is far more prudent.