This was creepy, and I love it. Don't understand it a whole lot, though my theory right now is that Bill is killing them and somehow an opossum crawls out of their body
What my theory is, that Its like a cult that transforms humans into Opossum.
Everybody in that trailers are people who lost people or looking to get away from society.
Bill is somewhat a good guy, that helps these people shed their skin and turn into Free wild creatures (Opossums).
We player comes along and kills these opossums that were once human who wanted to be free in wild.