This would very much be my favoured logical assumption too. Assumptions based on human logic are not always correct though! But of course I'm not there.
Was it only once that something has come onto the porch? I presume if it happened again it would be observable from the hide that will be resurrected (sorry can't remember what you called it).
I really must listen to the last two podcasts re X and get up to speed.
As far as being a hoax? It would have been impossible for the witness to be involved. We did not even go on our scheduled day because I had an unplanned change in my schedule. I also showed up at his house at a different time that I thought I would get there.
For unauthorized people to mess around with trains is a very dangerous thing to do in a post 911 era. It was just a happenstance that I was looking in the right place at the right time.
I updated my blog with audio and will travel back to the location the first of next week.
http://www.stancourtney.com/wordpress/railroading-sasquatches/