Weird tire wear

So where do you go to have the alignment checked on a Dexter axle on a travel trailer?

Are there RV dealers competent to do this or ... ?

And no, no race tracks, counter clockwise or other wise

EDIT: John Wahlstein has taken his Elkmont on a similar trip, except his tires were at 65psi.
Hopefully he'll chime in with his tire wear story, or lack of it.