Are you sure on that 2600# pin weight??
That light of pin weight shouldn't be dropping the rear of truck 3"
My almost 3000# pin weight just drops my SRW where the overloads are just coming into play.
Is that actual measured weight.....guesstimate weight...or dry weight?
Trailer sits level when hooked up...that's the way it should be for towing
So adjust your headlights (IF they really are shooting high) or add the air bags as suggested in your 9/5/13 post concerning the 'shutter' problem and tow as is or raise 5vr.
ON Edit:
That Cameo has a GVWR close to 15K---'wet' pin has to be close to 3000# so you must have an SRW with soft springs.
Air bag it.