I stand almost all the time for that reason. I glass 360 almost all the time for that reason, very slowly. I would probably seen that deer long before it got close to me, probably, they're cagie. I practice the shots I think I'll have to make for that reason, if sitting, sitting. That wool coat shouldn't be making noise. Is it new? If it is leave it outside in the weather. It will break in faster and be something you just don't hunt without. I have one I always take
You see just how fast things happen, be ready, you can sit and sleep at home, this is hunting. You have to control yourself for a fraction of the time in order to make all the time and money pay off, do it.
If you do it will be hero stories. Hope to hear one soon.

Sounds like you had a good day in the woods, better ones will follow. Many can't even get as close as you did, you did good.