As I said I do not auto cross, but do run an occasional track day, so I am no expert. Advice given to me by a very experienced racer was to keep camber reasonable, with just a little more in the rear than the front; give or take a little around -2. I like to keep a little toe in as it helps "feel " the center when steering. Big help is more rubber in the front using 8 inch rims width and LIGHT TIRES AND RIMS. Caster isn't really adjustable from my understanding on our cars. Once the camber and toe is set the caster is what it is, as the upper control arm has no adjustment without modification.
I just returned from the alignment shop this morning and have -2.2 in the front and -1.8 in the rear. I have the adjustable bolts on my lower control arms in the front and have them in the full inboard position. On the cars rear it has adjustable camber arms, trailing and lateral arms. I just got the H&R sway bar, springs and shocks installed on the front, so I'm now H&R both front and rear.