Short answer: Tire pressure and camber should be dictated by tire temp accross the tire.
Long answer: Yes I do adjust or dial in pressure and/or camber based upon what the car is doing or not doing. This happens at the track during a qualify/race weekned rather then switching springs etc. If it's a new track or one I do not have much setup data for then I will do everything I can to do the test day and bring springs and be prepared to play with toe & camber (front and rear), ride height, and tire temps and pressure. Once you know you have the most out of a setup including, spring rate, bar, tire perssure, etc. determined by tire temps and lap times then you can go from there with changes.