Hi syco,
I'll bet your in-laws could give you great advice . . . and I'll bet that advice would be to invest in quality firearms that do nothing but go up in value after you buy them. Also, NOTHING contributes to accuracy more than a great trigger.
Here's a .357 that arrived to me in Georgia today . . . from COLORADO, and from a Colorado handgun competitor and grip maker (in Greeley) . . . complete with good ol' American Elk Stag grips he made . . . from Colorado Elk!
The gun is the venerable S&W Model 19, in factory nickleplate finish . . . and in the very concealable (but still easy to shoot) barrel length of 2 1/2." This size gun would make it a tad easier toting all that camera equipment up those tall peaks . . . plus make it concealable (yeah, I said this twice).
THIS would be the kind of revolver I'd want to carry, if I were you, in Colorado!
And yes, it is used . . . from the early 1980s era . . . and still just as good as new. I'd be quite proud to wear it out in Colorado and rugged outdoorsmen there would surely respect your choice too!
BTW, Rugers are stout and HEAVY revolvers of excellent quality. I wouldn't want to tote the extra weight up the mountains myself . . . and their triggers are no where near as nice as those on the Smith & Wessons.
Taurus? You mentioned toting a lot of photographic equipment. If you are a serious photographer, would you skimp on a flimsy tripod or a cheap, imported telephoto lens? A camera won't save your life. Your S&W might!
Good luck on your quest but I'd wait and get a good used S&W (Model 19 or 66 if you want adjustable sights, or a Model 13 or 65 if you are happy with fixed sights).
T.