My experience.
Do not trust any tire shop to do it right without your own supervision
If you are dealing with expensive aluminum wheels (Alcoa or like) take a picture of each wheel and note any damage to wheel before work begins with the manager and the tech that will be doing the work.
inspect each wheel after tire is mounted before installation on trailer.
If you detect any new damage to any of the wheels stop everything and get the manager.
If he tells you the damage was there before work began, drag out the pictures and start the fight.
after they admit to the damage demand a new wheel/wheels
Dont settle for just free labor or an easy out for the tire shop.
Like others have said supervise the intire process or take the chance of being dissapointed with the results.
Most tire shops will not have the level of respect you are expecting for your equipment.
Always check the build date on all the tires before work begins.
Always use steel valve stems.
Do not take anything for granted.