Luckily I know a couple of ex cullers. The resounding theme is; unless your getting paid for them then don't carry them out whole if you want to hunt into your later years. This has served me very well.
I go for the gutless method wherever possible. Backwheels
, backstraps, shoulder provided it doesn't have a sierra through it.
The majority of my hunting is doc land and mostly done with a Tatonka stealth 35+10 pack which will fit 2 backwheels, backstraps into plus my other gear. It does it comfortably!. On the bigger trips the difference is I'll keep the hindquarters on the H bone and carry on top of my big 75L Bison.
One thing I've learnt in the last year is about being really careful with lifting as some are aware of my hernia from late last year so I'm fairly sure that's some of the wisdom comes with age stuff.