When I needed a good accurate 4" barreled 22lr all weather revolver, my S&W 617 no dash filled the bill very nicely, and still does that.
It's a bit on the heavy side to carry when wandering creeks and trout fishing, so I opted for the model 651, for coyote & wild dog protection.
The 651 WMRF is the cat's arse (imo) when it comes to a fishing companion revolver, though I wouldn't feel under-gunned carrying a model 63 filled with stinger 22 lr rounds either.
Plus, with a S&W 651, you can have an accessory 22lr cylinder fitted and have the best of both worlds!