So Camber is a tire wear angle and in simple terms, its the inward and outward tilt of the wheel at the top... inward is negative and outward is positive... the wheel has to tilt during a turn to allow for the inside tire of a turn going a different radius in that turn..
The simplest way to test for Camber is to place a long level on the sidewall of the tire at the top and across the center of the wheel to the sidewall of the tire at the bottom... mind you the unit needs to be sitting on a straight level surface...
I think that part of your problem is balance... usually a tire balance problem will allow the wheel to hop... this hop will cup the edge of the tire...
I disagree with the bearing issue if you have oil lube hubs, and you've paid attention to the lube and there has been no work on the front hubs... if they have been apart I'd open it up and check for the bearing pre-load... bearings that are lubed correctly and adjusted correctly just don't change much... and in an oil lube hube might go 50K miles without an inspection....
Also on a high mileage rig without lube fittings on the tie rod ends... a loose tie rod end from lack of lube will allow the wheel to shimmy and would usually wear the tire..
Hope this helps you understand what's happening
Retired Business Owner, Re-manufacturing HD Clutches, Brake Shoes, Air Compressors, Sales & Installation of PacBrake and other Industrial Friction