I have a blaze orange knit hat, voyager syle. I have a blaze orange shoulder-cape that gets attached to my hunting shirt. I also sewed a reversible waistcoat, brown on the 18th century side, and reversed it has blaze orange shoulders. (Makes for good B&W photos since the stuff matches PC clothing)
I have a very nice, white, screwtip horn, that I don't use during hunting season. I use a plain, brownish horn, and I don't carry a white, military haversack; instead using a natural linen one as my hunting pack. Don't want anything white bouncing around for some yahoo to think is the South end of a deer, and crack away in my direction.
I also carry an extra blaze orange hat, and post that on the side of the tree opposite where I am standing or sitting. I don't get into tree stands, but if I did I would do the same behind me there as well. You can be dressed like a roadway construction cone, but be hidden behind a tree to the next hunter that comes along.
LD