Hahaha, all our tack is working tack so we don't worry too much about a few scrapes here and there....but our horses quickly learn to behave in the trailer because they associate that as the only place they get to rest. Where we have our cattle, they are scattered out over about 10-12 miles; 30 in a pasture here, 20 there, and 15 over there. On a day where I park the truck and ride to check them all is a 25-30 mile day. If I don't do that, then we load/unload 8-10 times in a day. The horses learn fast that the trailer is the place to be if they want to relax and catch their breath LOL. If I'm on a young horse, everywhere I go is at a long trot or a lope so even if they are squirrely about loading that morning, they are more than happy to hop in by the end of the day.
The only time I've had tack damaged beyond what I could repair myself was my own fault. I thought my big horse would fit in the trailer with a saddle on because he had the year before. Turns out, he had grown a bit and when I put him in, I ended up getting the horn cap ripped off my saddle and had to have the horn re-leathered. I was so ticked at my stupidity, but I dang sure learned my lesson, hence the improvised saddle racks in my second above photo LOL.