Your rear camber should fall within realms of the stock adjustment, if you get BC's or similar then the front top plates are camber plates so you're set there too. I'm dropped about 2 inches and run about .5 and 1.3 camber front/rear. I'm not even close to maxing out the rear adjustments, I could still go more positive if I wanted.
If you're over 100K miles I'd suggest replacing the control arm bushings as well, they're probably crap.
If you're over 100K miles I'd suggest replacing the control arm bushings as well, they're probably crap.