What kind of experience do you have with big animals, i.e. have you worked on many elk solo? Do you backpack hunt, how much weight can you carry. 100lbs is a lot of weight, but not impossible by any means. I don't like packing more than about 120lbs as it hurts my knees too much.
There are areas that you can bone out the meat. IMO I wouldn't hunt western AK on a solo hunt, just logistics to get there and back alone would be a pain in the arse. There are more moose in other parts of the state with much better logistics. Look into flying out of Fairbanks or Anchorage. That way its one stop with the meat, vs air cargo, etc. There are places in town to get it taken care of etc. In the bush, you're on your own for the most part. Schlepping 500lbs of meat around gets really old fast.
If 400 yards is your limit, you should stay home because you're not tough enough to be moose hunting... just say'n. I've been in on 8 moose kills, two were close to a road 1/2 a mile or so, the rest averaged 1.5 miles one way. I hunt with a partner, but we also killed 2 bulls on some of those trips so it worked out that I packed an entire moose by myself.
If you're selective in kill locations, and hunt in areas where you won't kill yourslef (swamps, bad creek/river crossings) getting the meat out, I wouldn't worry about hunting solo. Lots of moose hunting can be done on dry-ish ground.
A moose is 6-7 pack loads plus antlers. Usually you can bring them out with the last load of meat, if you over-load the previous trip. A cape is 60lbs or so if green if you bring that as well. I haven't been in on one of those 1 in a 100 bulls that will go 150lbs a hind quarter, but I know they exist. Most average bulls are about 110-120lbs a bone in hind, and about 80-90 for a front. The neck is a load all its own, and rib trim and backstraps/tenders are another load.
The thing I would worry about is getting hurt, twisting a knee, or something like that or a moose running off and dying in a swamp. A packable come-a-long and a lot of rope should be in your kit.
One of the two bulls we shot on this trip was killed in the valley across the river at treeline... the second was about 1/2 a mile below that spot. The strip is on the river bottom to off the left side of the picture, it was roughly 2 miles one way from the kill site to the strip.