Movement and wind direction. ..., I sit as far back in the blind as I can so my silhouette is not visible from the sides
Here in Maryland a blind is required to post a big chunk of orange, and from what I've seen, it's a good idea to do so.....
I hunt from a "blind" but it's on the ground, There is a large tree to my back and I put an orange knit hat on the back of that. I can't shoot that direction anyway, as too much risk of a miss going over the property line, and I don't want any debate about "you shot my [fill in the blank]". I prefer a response of, "Mister if your [whatever] was damaged it wasn't from me..., I don't even face that way let alone shoot that way." But I digress...,
I stand back from the edge of the brush which I use as a blind. My face is covered and my hat has a brim, to keep my eyes in shadow. I scrape the brush where I'm standing to get anything dry and twigs out from under my feet, and this also kicks a little earth-scent into the air. I wash my hunting clothes with plain lye soap, no added scent, and then the outer layer is held in the smoke from a hardwood fire for a couple of minutes. This so far works really well. Movement is very slow when I move at all, and I pay attention to wind direction too.
The advantage of the ground blind is that a) I won't fall out of it, and b) I can move my feet to keep the blood going when it's cold.
The disadvantage is I don't see very far, and any wind picks up all of me that might have an odd scent.
Here a lot of guys use ladder-stands, instead of blinds. The disadvantage for them is their feet, which a lot of folks don't even realize they are shifting, are only a bit above the sight plane of the incoming deer. Easy to unwittingly alert them something odd is up in the tree.
A possible disadvantage of a blind, is sometimes construction. I can shift my feat on the loam, and make very little noise, but sitting on a wooden platform with hunting boots, and putting one's feet down a little too hard makes a pretty loud thud...maybe not to us but deer's ears are sorta like a pair of radar scanning the area. Some some folks in an elevated, plywood blind put in carpet or at least put a chunk under where their feet rest.
(Heck I'm built like Santa Claus, so maybe my footfall is louder than most ? )
LD