+1 on the comments to check out the backpacking forum. I picked up a couple pieces of Sitka, Kuiu and SmartWool merino base layers in the past year. They all seem to work well. And they are all comfortable. Much prefer the merino over the polypro (just my opinion). Big thing for me is learning to add and remove layers as the level of activity changes.
Not sure how it would work for bow hunting. But for rifle hunting, the Hill People Gear Mountain Serape makes a good "over the top" wind break, extra thermal layer while glassing or taking a break. Would probably make a good lower body wrap to keep your arms free while on stand as well. But have not used it in that manner.
