Less caster and camber, as you have already noted. Softer front springs and softer side springs will calm the car down and make it roll more rather than hike. If the inside front starts to lift, add side spring preload.

Smaller tires, less of a radius (more squared), and less time for additive application are all tire-specific items you can do to reduce hiking. At my home track I usually do 30 minutes for rears, at Snowbirds I was only doing 15-20.