Hi mate
I run 6 degrees negative camber on the front of my 1200 via a redrilled crossmember and custom camber plates.
If you decide to redrill the crossmember it would be a good idea to weld up the old holes and plate around the new ones to add some strength.
Personally I would start with camber plates and do the crossmember only if you can't get enough neg camber from the camber plates alone.
Matty