Camber Sleeves
Your van already has a set of the eccsentric bushings in it. The question is which set did the factory install to bring the van into alignment. In order to adjust the camber the front end man will have to first check the allignment and then take the bushings out and see what degree they are, then do the math and select a new set that will correct the error, install them, and allign the front end again.
Alternately, he can put zero degree bushings in to begin with, check allignment, do the math and install the required corrective bushings.
If you have nay front end parts that need to be replaced such as the I beam bushings or ball joints or any of the other wear parts, you should do that work first because the above mentioned process is more expensive than just turning a few bolts.
Before you start cussing the old twin I beam though keep in mind that many front ends have no adjustment and Chevy's (at least older ones, don't know about newer ones) came with a factory setting. If it needed to be adjusted you had to buy the adjustment kit that has the eccecntric bushings in it.
As far as the wandering goes, maybe if it is far enough out of adjustment. If that were the case you would see uneven wear on your tires. Is there play in the steering?
Suspension components (shocks, springs, bushings) in good shape front and rear? Tire pressures correct? Loose wheel bearings or worn steering linkage?
Gene



