Is it possible his body was put directly into the truck, and not into one of the dumpsters? What route did the truck take?
Refresh my memory; When and where was he last confirmed to be alive?
One of the articles we've read gives details about the ten dumpsters. (John Wheeler 10 trash bin sites: Delaware sleuth provides photos, commentary) It lists them in the order listed by the State, and suggests that must be the order in which the truck picked them up. I plotted them on a map, and I don't think it would make sense to pick them up in that order.
http://i55.tinypic.com/119qkyh.jpg
Click photo for larger image
The following image shows the dumpsters (left) in relation to the landfill (top right) and Wheeler's home (bottom).
http://i56.tinypic.com/selwdt.jpg
Click photo for larger image
His home does not appear to be along (or even near) the route the truck would have taken. But I've forgotten where the train station and hotel parking garage are located. And I don't remember where he was last seen alive. It might be interesting to see those locations in relation to the dumpsters and the landfill.
Also of interest, what route did the truck take? Did it start out at the landfill, or some other location? It seems likely to me that it would have started out at the landfill, but I don't think we can assume anything.
We've all questioned how Wheeler could have gotten from his last known location to one of the dumpsters, a few miles away. Maybe he didn't. Maybe he was dumped directly into the truck, on its way to the dumpsters.