I do know where your coming from. Being new to detecting myself, I can reflect to areas like Freemans creek, in PA, and the upper Mohawk river, in NY. Thinking back to the potential of relics of these areas is nothing short of remarkable. But, at that time I was more concerned with matching the hatch or mending the line to get the most natural drift for my nymph presentation. My problem is that my wife doesn't enjoy the fishing aspect, but does enjoy the historical value of a good hunt with the metal detector. I have my sentiment towards my fly gear - every rod and reel have a specific purpose that I guess I will never be able to part with.
I wish you the best of endeavors in both hobbies and hope that you share your results with us - I always enjoy a few fish pics and stories too.
Woody