And the best part is that the car is already on the jack stands! Err..... that'd be the trailer.
If that is impractical for some reason.....
I have had similar issues. My first car lost a corner. We got it on the trailer, believe it or not, by driving it up with a roller jack under the front corner, and I got it off, singlehandedly, by backing the trailer up to the cars future spot, tieing the car to a tree and driving away after putting a strip of wood on the trailer, oiling it and putting another peice of wood under the lowered corner. Ugly, but it worked.
Another method would be to get a couple wheel dollies at BJs (or such) placing them under the locked wheels, cranking the front of the trailer up and easing it down on the handbrake.