[Pahaska]

The best method is to take some non-damaging markers such as cardboard boxes to an empty parking lot and practice.

Turn the trailer moderately, get out and look at the clearance between bumper/fender and the trailer. Turn more tightly and repeat until you have an idea how tight it is safe to turn. Memorize what the trailer looks like in the mirrors when near the turning limit. This will prevent denting something later on.

Now, set up the markers to make a back-in site, about 10' wide. Approach it at 90 degrees as if you are on a road in a campground. Now, practice backing in without hitting the markers or exceeding the safe turning angle.

Let's say the site is on your right. Approach on the right side of the road, close to the markers. Swing away when you reach the markers, then turn sharply to the right as the tail of the trailer passes the markers. Stop. This puts the truck at an angle to the trailer so that as soon as you start backing, the trailer will naturally turn into the site. Use the passenger side mirror to watch the trailer wheels in relation to the markers. Don't worry about the other side of the trailer ... just put the side you can see in the right place and the other side follows.

It is often worthwhile to pull forward at least once during the process to better align truck and trailer so that the rig is fairly straight when in the final position. Makes leveling and unhitching easier..

It's good to have a spotter to help, but I travel alone most of the time and I have no problem backing into a site. When in doubt, get out and look, even if you have a spotter.