The super redhawk is Ruger's flagship revolver and are very nice. However for backpacking I would rather carry something else. I like the Redhawk a little better for that role as it is a little lighter and smaller. If you could find one in a 4" barrel that would be perfect. Also the S&W 629 Mountain gun would be another option. They are a little more money than the Ruger but they are also a nice handgun.
If you are interested in an automatic then I would recommend a Glock 10mm, or a 1911 chambered in the same caliber. Or if you wanted near .44mag performance out of an auto pistol look at buying a 1911 in 45 ACP then buying a .460 Roland conversion kit for it.
I myself carried my 1911 in 10mm when I was working up in WA state and was out hiking the trails. Good heavy loaded bullets from Double Tap work well if you don't reload for it.