I used to carry a gray wool blanket up with me for one late season stand I had. The stand was in a huge white pine so I wasn't worried about back cover and I used the blanket draped around me for additional wind blocking and warmth. I cut a small slit in it and ran my safety harness through it so when I shrugged it off my shoulders it wouldn't fall. Worked pretty good, but can't say I ever shot a deer while wearing it.
While this cloak is "cool" on a certain level, i.e. LOTR, I wouldn't ever wear one just from a practicality standpoint.