I don't think this is what happened. He arrived at Keith Sherman's around 8:15 Saturday morning to pick up the MH.
DW could definitely get on Keith's property undetected, but moving the MH is a different matter. Then, why would he return it in the wee hours then come back for it a couple hours later------Wait--cover-up and alibi? But that still doesn't give him much time.
As redlipstick pointed out, her hair was in his master bedroom.
Glad to see you're reading the transcripts.
Here is Westerfield's interview with Det. Redden:
http://courttv.com/trials/westerfield/docs/police01.html
I must not have been clear. I don't think he moved the RV at all. Sequence = Abductuct to SUV to RV to SUV to Dehesa to Home.
If Westerfield did this he did it within a short period of time (as most sexual assaults are) and he didn't have possession of her or her body for any length of time. He is too anal to have a body around and the passion that motivated him to abduct her and kill her would have played out in a short few hours.
I also think the RV would have been a safer and less obvious spot then for him to take her to his home where if it was found she was missing he might get caught from a house to house immediately after.
The natural reaction would be to run and hide with the girl. So, he runs and hides with her at the RV storage place.