I wish I could see a better map. LOL, great effort though! It is hard enough to make a copy from a TV broadcast. From what I can tell it looks right for a body dump, although he did more driving around than what I would have expected.
Last Ky ping was 2:58, first Oh ping was 4:13. That makes it about an hour and 15 min between pings. It would take about an hour to get there. Ok next Oh ping is 4:15, about 15 min later. And he was moving as the pings are fairly wide apart. Back at the river about 5 am.
Now considering he had to find somewhere out of the way, at night/stop or park his vehicle where it wouldn't be noticed. Remove things from the vehicle, and carry a dead weight along with a flashlight. Remember he would be walking on rough terrain, with bushes, brambles and fallen logs or grass clumps. From that I am thinking not too far off the road. From the amount of time he was in the area, I am thinking he may have dug a shallow grave or maybe hacked some brush to cover the remains.
Alternative is that he parked, got out the flashlight and her remains and walked quite a ways into the woods. He would have been fighting the terrain and the plant growth all the way. I don't think he would have been likely to do that unless he had a particular place in mind.
Unknown factors: I don't know if there are any caves in the area. Or wells. Also in nearby Batavia there is some old growth trees, I think Sycamores, that are still growing, but are completely hollow in the middle. I don't know if there are any in EF.
