Roll with it.
My dad is 80 now and it's hard to get him out of the house before 7am and he wants to be back in the truck before dark! The past few years, I haven't even bought a license (non-res for me), I carry a chair and his pack for him and wake him up if the deer are moving.
These are the best hunts, as it's always in the back of my mind that any one could be our last.
As for your situation, put your gear in a trash bag and get dressed when you get out of the truck. Don't worry about what Dad and cousin are doing. If you have success and it's important to them, they'll start paying attention
Jim