Wild game tastes differently from region to region dependent upon their diet. Deer, turkey, etc. in western Pennsylvania will taste slightly different from those found in other parts of the country. The same is true of ducks and geese.
Even though ducks and geese are migratory birds there are many waterfowl that choose not to migrate. They become regional birds (resident) because there is a food source to keep them in that particular area. If they have an ample food source they generally stay put.
I believe what you are experiencing is just that. You are not used to the taste of the waterfowl in Santa Clara. An unfamiliar taste that you have never experienced.
That being said the concept or wild game tasting different or "gamey" to those who do not hunt is nothing more than an unfamiliarity to something they have never eaten before or are used to.
If you never ate a chicken before and tasted it for the first time it would probably taste "gamey" to you.
You didn't specify if the birds you harvested were sea ducks or not. They defiantly taste different from a Mallard, Black Duck, Teal, or Wood Duck whoes diet mostly consists of grain.
Usually trying to mask the taste makes it worse. It's just a matter of getting used to the "different" taste. However, if you need recipes I would be happy to help.
I hope this helps,
John