I strapped my Ultra when we went do Daytona for a cruise, which came back right in the middle of bike week, then trailered it across country a few months later when I retired from the Navy. All-in-all, about 3500 miles.
I mounted a Bike Pro wheel chock in my trailer, then used powertyes, the 2" kit with the sheepskin sleeves to tie the bike down. Not a mark on the bike.
As far as how I strapped it down, I put one strap each side attached to the frame above the cross piece on the frame. These came forward and down at a 45 degree angle. Tightened them down until the fork was compressed an inch or so, and then placed a strap on each side on the back of the bike attached at the passenger floorboard mounts. These were strapped to the floor of the trailer slightly to the rear of the floorboards. Tightened these up decently, didn't really look at the compression here, just made sure the front remained compressed (checked again after putting the rear straps on).
I stopped after about 75 miles, tightened the straps a bit as they were new and I figured they'd stretch a bit with the ride. I then checked them at about 200 miles and every 200-300 miles after that.
Made it to Daytona and back to Virginia Beach with no problems at all, then from VB to Denver, CO doing the same and absolutely no problems.........and not a single mark on the bike from the straps; which were touching the chrome engine guard, but the sheepskin sleeves did their thing and protected the bike.
One word to NOTE-----If you use a Bike Pro wheel chock, MAKE SURE THE CHOCK IS MOUNTED GOOD AND TIGHT before loading the bike. I mounted mine, went to Daytona, and when I went to load the bike for the trip back, it was loose (it's a two piece unit...actually more, but two main parts that mount together). I took the tools out and after I finished I never had to worry about it being loose again.
Now the trailer has served its purpose and I'm planning on selling it as I have no plans to ever trailer the bike again!:newsmile055: