Kim, you need to find a way to accurately measure the camber on your car. In all my years of experience around cars I've never heard of just camber causing such rapid tire wear. I really suspect something else is wrong, that's not to say that the camber isn't out, just that there is also another problem lurking.
The front camber on my car is visibly negative, but I'm not experiencing the same type of rapid tire wear. I just got back from a 2500 mile trip and can't see any noticable change in the front tires even on rather soft Yokahama AO48s.
Incorrect toe setting or ackerman due to a bent steering arm will scrub the tires very quickly. You'll need good level ground to check that as well so check around the neighborhood you should be able to find a parking lot or such that is level enough for some measurements.