Am I missing any other must haves? I’d prefer to get it all in one big order.
I can't tell you how many times I have fallen for the ol' "I'm going to order all of my hunting stuff in one go and be done" trap. Trust me, you will always find another thing that is "necessary" and you "forgot" to include in your first order. Please, learn from my mistakes and just buy as you go. You might be surprised how much crap you don't need!
It's fun to buy new gear, but I would recommend starting with the bare minimum. You might get some of those pouches, for example, and never use them. Some might say that stuff is necessary, but I wouldn't. As long as you have sticks, a saddle, a way to get your gear up the tree, a way to secure your gear on the tree, and a way to carry all your gear to your spot, you have the bare necessities to hunt from a saddle. At least practice setting up with that stuff and sitting in a tree in your yard a few times to see what you might actually need/want to add to your set up. Better to start cheap and add piece by piece than the opposite, in my opinion.
Don't forget that saddle hunting is rooted in a DIY history. It doesn't need to get expensive, and you can easily save a lot of money by making some stuff yourself. For example, I made a gear strap out of an extra ratchet strap, 550 cord, a couple of carabiners and a camjam––I had all of that (minus camjam) laying around. Just think, how many deer would you have to kill to "pay for" your hunting gear? Not that meat is the only thing to get out of hunting, but that has helped me cool it on the spending.
Sorry for the long post, and especially not what you were asking for. It's just that all of these lessons are still fresh in my mind from a year ago, when I first started, and I hate to see people get sucked into the not important part of hunting, i.e. buying over-priced gear. Good luck this coming season!!