DA had the same advice I would. I never go in a trailer with them aside from getting in to close the slant dividers. I toss the rope over, tell them load up and then take off the rope via window and clip the trailer ties. Pasture, carry a whip. Don't give them any choice but to respect your space.
My fears: Ending up under one that flips over (have lost a friend and have another that can't have children from flippers) I did a one off ride awhile back for friends and horse was a known "chronic bucker", they asked me to ride him out, I'm cool with that. I didn't even get my butt in the saddle and he literally launched himself back & over, no warning at all just went. I got my leg pinned but no injuries. Have no desire to deal with that again. Ever.
My second, getting hung up in a stirrup & dragged. I've went 25+ years riding without that experience and I'm good with that.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.