Cabelas makes good gear. Have also had good luck with Browning. I like heavy fleece (polyester, not cotton) that is Gore-Tex lined. Warm, water-proof, and quiet. Layering with fleece and breathable long underwear goes a long way in minimizing sweating and subsequent chill. If burrs are a big factor, there are breathable outerwear that is also burr resistant. Wool also works well, but can be heavy, and dries slowly. Just stay away from cotton, as it absorbs moisture when you sweat, loses most of its insulating qualities when damp, and takes a long time to dry out.
Larry