I decided to forgo the truck and just rig the trailer so I don't need the truck.
I used 4 jack stands, the type most husbands have in their shop or 4 blocks of wood would work just as well.
I park the trailer on the grass so the wheels won't roll, drop the tongue down a bit by cranking the handle and then place 2 stands/blocks under the back of the trailer , at the corners. I then crank the tongue up ontil the rear blocks are loaded.
I then put 2 blocks under the front corners of the railer, against the frame and near the front at the widest point.
I then lower the tongue again until these blocks are also loaded.
I then just snug the front jack until it too still retains load.
I now have 4 blocks or supports holding the corners of the trailer and tongue.
I loaded my boy last night and forgot the truck was not attached while working with him. It was very solid since the suspension no longer supports the horses weight.
No movement whatever.
This makes my daily practice alot easier and faster.
I ask him to load twice and if he does the load and unload perfectly that is all I do and put him back.
He is approaching the trailer is enthusism because he knows a treat awaits him once he is loaded, the butt strap done up and tied in the trailer.
Take a few minutes, block the trailer in an out of the way spot and practice away.