I love my wool and am more of a plaid wool kind of guy rather than the camo stuff. That being said, I do own unlined pants and jacket from Gray Wolf in Predator Fall Brown. I've had it for quite a few years and it's great stuff. However, I absolutely LOVE my Filson Mackinaw wool vest and my Woolrich wool shirts.
The wool vest and shirt combo, with light weight moisture wicking thermals underneath it, is very versatile and to me it's comfortable in all kinds of temperature ranges.
As far as American made stuff, a lot of the Filson stuff is made in America. It's not cheap, but you will hand it down to future generations. It'll last that long.