Thanks for the replies and ideas. It is to late for this one, I made a few mistakes and sadly ended up having to pitch this one. But I want to at the least learn from it so I don't make that mistake again. Lessons learned.
Don't let them stay warm, I noticed when I got home from the 6-7 hr drive, on a 60-70 deg day, I had the hide folded up into a 2'x2' ish square. Ice on top and in the middle. Well between the layers it was warm, almost hot. When I went to lay it out in the cold rm. Plus it was wet from melted ice. She was slipping the next day. Maybe that's a moose thing?
Next, I let it get some small rocks and gravel on it, they stuck to the fat, didn't think much of it. But laid out in the cold rm over night, they dried into the hide (not a lot, but a little). Enough that they didn't want to come off, and where making fleshing a PITA.
Plus I wasn't set up to flesh something that big/heavy and my fleshing beam kept falling apart, and it was just a all around PITA. So I ended up tossing it. I need to build something better for my fleshing. What I had worked for beavers and otters, but it just fell apart when I was trying to do the big hide.
So I just said forget it, and make sure I have everything in order and take proper care of the meat. Again meat was my focus. And the meat turned out great and I didn't lose any of that. And I learned some lessons about how quick you can lose a cape or pelt. I was shocked that the hair was falling out the day after the kill. But it's my mistake, wet and warm, it's a bad combo. I should have known better.