I would first try to find the most level/flat ground you can find and re-assess. Sometimes with a basic lift or a disconnected sway bar it will look totally off camber.
If you do re-assess, and the problem persists... jack up the "problem" tire, and try to rock it 12 and 6 (think of a Clock).. if it rocks 12 and 6 your unit bearing is bad. A common method of thought is that you replace both sides because the other one will go right after. I only fixed one, and with only minor problems have had no issues with the other side weakening
I want to say that if it rocks 3 and 9 there is a different problem (but I do not know what that is) maybe U-joint