Sincere condolences on the passing of your brother and, clearly, your good friend and hunting buddy.
It's a terrible disease that doesn't pick and choose its victims.
You will, no doubt, remember your brother fondly in years to come, when you find yourself in your hunting camp, or in one of the places that was "special" to you both. When people like that leave, all that we are left with is their memories. But that is how they can stay alive and with us in our hearts.