Got this bull solo this past September. He's a mature 6 point for my area. 280 lbs between the meat and caped out head for perspective. Cutting this thing up solo was a 6 hour ordeal...made a lot harder because his butt was sliding into the creek constantly, which made it really difficult when it came to trying to flip him by myself. I know for sure many folks would have taken shortcuts on cutting this one up if they were solo due to the difficulty. I was 3.5-4 miles to the truck one way, downhill to the truck after a 450 ft steep (on all fours for portions) climb out of the hole he died in. It took me 6 hrs to get him all quartered, 22 hrs of moving everything and 8 hours sleeping for a 36 hr turnaround in all. I leap frogged the meat with two different points along my route out based on the terrain. Basically, this allowed me to do each quarter seperate for my steep climb, then combine misc meat with a front quarter to cut a trip for the rest of the packout. I'm a fan of leapfrogging because you have more time walking unloaded which helps you recover and imo keeps your body fresher. Very key to be fast on your turnarounds/reloading your pack though or else you can end up with a lot of lost time.
I made sure to push within my limits so I didn't bonk myself on the moving meat part and after many elk packouts, I've learned it's just best to get good sleep once you get the animal cut up, so I only hiked stuff out until 10pm and picked it back up in the morning of the second day. I was fortunate to have killed at 8 am so I was working with a lot of daylight the first day.
All in all, I've done some solo packouts and I've found it best to not approach it with your head cut off...your real time and your memories are much more enjoyable when you're working within yourself and not grinding all night or trying to go super fast.