Without looking at the specifics of your setup (trailer, ramps, burbs frame, etc) I can't give you any step-by-step advice. BUT, I will say to just remember your elementary school "physics" lessons and do not forget or underestimate the usefulness of a couple of rollers made from 2" or bigger steel pipe. If you can get a couple under each frame rail and keep the rest of the load clear of the ground and other obstacles you can make significant progress without taxing your winch. Just go slowly and a little at a time and you can move it anywhere. This method is safer IMHO than trying to perch the body on a couple of jacks in that if it shifts it's not going to fall as far or tip precariously. And if the roller itself gets hung up the winch may pull the frame rails across that steel pipe as the contact area is terribly small.
Also do not forget to shift your frame of reference. If the burb is too hard to move then move the trailer under the burb. Get a jack under it the truck somewhere near the firewall and raise the front as high as you can. Then back the trailer under until you reach the jack. Lower the jack, place it further back, and repeat. Use various methods of jacking and the rollers mentioned above to slide the trailer under the truck. Go slow and use a spotter so that you don't damage your trailer or get hurt.
An easier method yet is to call a local hauler (usually find a bunch on Craigslist) that pay cash for autos. A lot have ramp trucks and taking a little less cash for the ease of disposal may be worth it.
Good luck and stay safe!
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