I'm in agreement with you, but it could be anywhere, not just Jimmy Camp Creek area. But yes indeed, the killer would want cover to dispose of Gannon's body, likely a wooded area, up to a thousand yards or so off the road.
Problem is, there are literally hundreds of such places in the area. Places we're not even aware of.
A google earth aficionado can spend hours looking at the back roads and possibilities.....I have
If you've never heard of a travois, it is an interesting item. The reason I bring it up is, I personally have moved loads that I could never lift, simply by dragging them on a tarp.