Some random thoughts.
If you go to google street view and look at the gate on 105 where they were intensively searching, I wonder if that gate is locked, or if someone could open it, drive in, and close it behind them. OR, any one of several other gates I've seen. Like on Noe rd. off of 105 before you get to S. Greenland Acres rd. there are two lanes that go off to the left up along the wood line, easily visible from google earth.
These types of farm lanes that go in to pastures, or that simply go back in to sparse woodland, they would be good reason to take a 4wd, just in case.
Now, back to that gate, at the 's' turns on 105, if not locked, one could pull up in there and be somewhat out of view.
Another thing I noticed, on street view, is when you are looking directly at that gate, there is wire fence there. I'm not sure if it's still there or not, but I think I recall the searchers being on the OTHER side of that wire fence, searching meticulously. I have wondered why all the search up on that mound, and on the other side of that fence? How'd we get on the other side of that fence, and why? Did someone try to escape, and a tussle ensued? Or did we just throw stuff over the fence?
Also, just as a thought, 't' rex made STRONG mention of hiking at Garden of the Gods. I wonder why that was so important to her, you know, for US to know that. Sounds like that period of time may be when some research/work was being done. Sure, maybe they 'went' to GOG's, but for how long, and where else might they have gone/explored that day?
carry on!