it's not so much the camber angle and wear on the tires you need to consider - its how it performs on the road. When I added 3" of lift and drove it w/out an alignment on the stock tiny tires, it drove relatively straight but hitting potholes and braking hard made things interesting. Your contact patch on the road is reduced, the increase in caster "lightens" the steering a lot, and it just felt very squirrely over all. But that was with 3" of lift, worn stock sized tires and no removing and re-installing control arms or steering linkage. But things were definitely out of alignment, not just the camber and caster.
If you're just throwing on a couple clevis rings, I think you'd be ok. Just be aware of any changes in handling, steering and braking before you get into a tight spot...