Adding to the many trailer topics… This is a PSA.
Get in your trailer. Grab and shake the divider. Fling the ties around. Take a full haybag and bang it around. Go in the dressing room and see if your bridles and stuff bang on the wall. See how loud it is?
Now, take some time and a small amount of money and quiet that crap down.
Get a cheapo run of carpet. Cut a square with a slit and slip it over the tie loops so the clip of the tie doesn’t bang on the wall and hits the carpet instead. Get a 2’x4’ chunk of cheap plywood and staple the carpet to it - screw this in the wall behind your bridle hooks so they can’t make that godawful metal on metal sound. Take a close look at your divider - how can you remove some play or muffle the metal-to-metal rattling going on? I use electrical tape on the pins, or plastidip. I also use sheets of 1/16" rubber cut into strips to line the pin holes if there’s room.
If your horse “doesn’t like the trailer” please do him/her a favor and try and figure out why, and fix it. It shouldn’t be deafening in there when they’re going down the road. Don’t leave unused ties not clipped up to swing and bang around.
For a paltry ~$80 and about 3 hours of work, you can make your trailer way more enjoyable for your horse to ride in. Bet they won’t hate it so bad if you make it marginally more pleasant for them to be in there going down the road.