So sorry for your loss, man. It always sucks just a bit more to lose any of the special ones in our life.
My "parents" were giving myself and my older brother up to a foster home when I was 3 and he was 8 but my grandparents had other plans for us. We moved in when I was 4 and they officially adopted us when I was 8. Grew up hunting & fishing my whole life, just as your family. I get that strong bond, which you clearly understand. Nothing like the love of maw-maw & paw-paw.