The best advise I can give is to embrace the suck... because it will suck. But with the right mind set, you will create great memories and reinforce your love of hunting.
I have harvested two moose while solo. The first was was harvested 1 km from the road. It took me three days and 8 trips to get it out in rough terrain and think alders. The second moose was more than 5km from the road and took me 5 days and 8 trips to get it out. The math says that's over 80km of hiking with all the trips in and out. Cool weather was key to making this possible. I've done both, but prefer packing quarters out with the bone in. Yes there is a weight penalty but I found I could distribute the weight better, and it's easier to hang later.
I actually had a hunting partner for the second moose, which was harvested an hour or so before last light. We stayed up most of the night butchering and slept under a tree in our rain gear. It made all the difference having having someone there as I have never felt comfortable field dressing an animal after dark in bear country. My partner had to leave in the morning and took a load out with him. I relayed all the meat to a half way point before packing it all the way out. This allowed me to keep the meat above snowline and made each trip easier, at least mentally.