Don't feel bad, enduroryda, as we knew what we were getting into. The owner forewarned us about the debris before we even drove down to look at the trailer.
There wasn't any place for us to dump the contents so we hauled it all home with us. Our thought was it would be easier to deal with at home plus we wanted to take our time going through it so we didn't accidently throw out any "treasures." We did find a few treasures like a bag of original Bargman hardware including the missing door knob lock set, a chrome Bargman shut-off valve for the water, all the cast aluminum bunk bed holders, the cast aluminum dump elbow, and all the parts for the water filter.
The top half of the trash in the trailer consisted of moldy cardboard boxes of papers and books as the original PO was a college professor. The bottom half of the trash was also papers and books but these were deteriorated so much by rodents that I had to use a shovel to remove the debris. Also, there must have been critters larger than mice living in the trailer as we found finger sized scat everywhere.
And then there was the smell...arghh...it was awful. I can't even describe it. The smell permeated everything -- my hair, skin, and clothes. I used a high quality mask with special cartridges which filtered out smell, mold, and dust.