You've gotten a lot of good advice, MD DH. One thing I would add, that someone else alluded to indirectly, is to practice setting up your tree stand ahead of time. Get familiar with setting it up in the tree, climbing into it, sitting in it, and, if possible shooting out of it. Then, at least once, try setting it up in the dark, from scratch. Carry it a few dozen yards into the woods after dark or before first light, and then set it up. It'll be different enough the first time you do, it'll take longer. And allow for this extra time when you time setting out for your hunt. You'll be less likely to end up rattling around, getting your stand set up at first light, as the deer are filtering past you.