Underarmor makes a great camouflage beanie for that purpose. I have a black one I wear out day to day, and a camouflage one for hunting. It is not small, I have a normal sized head and it fits perfect. Maybe you have some huge melon head, it might not fit.
Here is a link to it at Cabela's. Plenty of people sell this beanie, I just wanted to find a link with a good picture and description for you.
http://www.cabelas.com/cabelas/en/te...rue&hasJS=true