You know, reading through these posts made me think of something else.
They lived in a heavily wooded area, typically in cold weather, there tends to be dew on things. If this is an abduction, wouldn't the ramp have dew on it causing it to be slippery? I am thinking too, if that back door was never used, like RC & MC claim, then the ramp should have some sort of algea growing on it from the dew and humidity. Wouldn't that also make it difficult to carry HC out that back door, taking a chance of slipping and falling, and waking her (assuming she was alive when carried out that door) and possibly making enough noise to wake Misty?
The reason i bring this up is b/c grwoing up my parents had a large wooden deck in the back yard, that was hardly used. When the weather would change the deck always got a slime type thing on it that made it very slippery. And there was no incline on our deck.
JMO