Before I had a loader tractor I used a come-a-long and a 2x10 to ramp big deer into the back of a pickup.
My uncle usually goes out to my property to get a deer after all of his grandnephews have bagged their deer. Consequently, he is frequently out there alone.
He is not a large guy, and he is getting up there in years. He can still field dress by himself, but two years ago I had to drive out (45") just to help him load a medium-sized doe into his truck.
I have some cheap aluminum ATV-rated truck ramps and a come along. I definitely need to take your advice and set that gear out for him by his favorite deer stand!