Well, by now you have heard a lot of opinions. You know how that is....mostly what each person, probably after much experimenting, has settled on for themselves. You are probably gonna have to handle many revolvers and make your own decision. The .357 in a stainless seems to be the one most mentioned. I even recommended that in an earlier post and I don't own a .357 Magnum. I have owned several and probably owe some of my hearing loss to shooting an M19 lots. For owning only one revolver, it's really hard to beat a .357 Mag. For me, it's just a least favorite caliber, but, you can bet...If I only owned one revolver it would be a .357 Mag or a .44 Mag. You can get them light or heavy, short or long, cheap or expensive. I prefer larger calibers with both light and heavy loads but not necessarily magnums. Up until recently I owned 4 Smiths (a J, K, L & N) Just the other day I talked a friend into letting me have back a favorite he had talked me out of some time back (S&W 696 .44 Special) so now I have two L frames. I also have a Ruger Redhawk .45 Colt that I would carry into any woods in the country. The point I'm making is you have to decide what is right for you. To me, owning, and using, several different ones is part of what makes it enjoyable. I can decide whether I want to carry a lightweight J frame, an old standby stainless .38, a Scandium big bore, a fairly heavy stainless .44 Special, a fun .45 ACP revolver, or a big bruiser Stainless .45 Colt. They all get used lots. However...one of the most fun handguns I have ever owned now belongs to someone else (I needed the funds for my 696). It is one that many people here have derided as an option. It was a lightweight Taurus Judge with 3" barrel and 2.5" chamber. I'm here to tell you that .410 takes good care of the Copperheads at normal snake range. I'm not advocating the Judge as a true self defense handgun but for the woods it would work well. Mine was lightweight and easily carried -- very efficient on snakes with bird shot -- and extremely accurate with .45 Colt loads. With heavy woods loads it would be a handful, but no worse than many .357s. I probably will have one again some day down the way. Just plain fun!
Anyway, just handle and shoot as many different ones as you can and make your own decision. Trying to get someone to select a handgun for you is like trying to get someone else to select your girlfriend or wife. Have fun.
...practice, practice, practice..... That's right. Have fun.