The tails will whip the crap out of your paint, too.
A good practice is after the ratchet in bailed over in the "locked" position, wrap the tail around the mechanism to keep the ratchet from releasing and slipping through the bail slot.
One thing many neglect is the loose extra ends of the straps. I've been called paranoid but I fold them up and then use zip ties to fasten them to the main strap so they don't come loose. Make sure to bring something with you to carefully snip the zip ties with or you might not be doing much unloading.
I do this because I was riding in a friends truck with all our bikes on his utility trailer. All of a sudden we started hearing this banging noise behind us. I saw a horrified look on my friends face as he looked in the mirror so I turned around to see his bike slamming down into the side of the trailer. One end of the strap got loose and kept getting caught under the wheel of the trailer which would tighten up slamming the bike over before being ripped loose only to do it again. He managed to get pulled over before any real damage was done but I learned my lesson about loose straps. Not so much an issue in an enclosed trailer, but in the bed of a truck or an open trailer you need to pay attention to them.
Using a Kendon single bike folding trailer with the wide ride up ramp for Wing and a receiver rack for dirt bikes up to 400#. Best of both worlds. Ride up ramps for truck didn't appeal to me.
There's lots of pricey solutions to this problem, but honestly a small little utility trailer gets my vote. Stick a decent cradle wheel chock in the front. Tilting ones would seem the way to go, but on shorter ones (8-10ft or so), you'll find that trying to drive a bike on doesn't work- the front axle gets past the pivot point before the rear wheel touches the deck, so the trailer slams down and bottoms out on the bike.