[chris vickery]

Ask Craig Tanner how easy it is!!!
Him and I loaded the one I sold him back in Ontario several years ago. As I recall, Craig already had back troubles before we attempted to load it on his trailer.
They are a pig.
I would suggest if you cannot pick it up with a crane, a loader etc, that you devise some rollers like logs or telephone poles to roll it across the ground to where you can access it with your trailer.
Then you jack it up and crib in place, jack and crib etc until it is high enough
to back your trailer under it.
When I originally bought mine, it was stored up on top of 55gal drums spaced wide enought that we backed the trailer right under and basically did the reverse, jacking and cribbing all the way down to the trailer deck.
And all this goes on the assumption that the framework of your body is solid underneath, you have a volunteer to help you and have at least half a day.