I understand that you are looking for a revolver,...but, something you might want to consider in an inexpensive, single shot "youth" type rifle. One is called the Chipmunk" ( appropriate since that is your "post" name). With a 16" barrel, peep sight, and small stock, it weighs about 3 pounds. With it's barrel length,it will be quietier then any handgun, doesn't weigh much more, and is certainly rugged for your use. With any luck you can pick one up for $100. or so. Just a thought.
Mark