Can't help with much on this but ...
IIRC, the last cell phone ping to/from BW's newly acquired cell phone pinged a cell tower in Mobile County which is where CW's rented home is located.
And the pinged cell phone tower's proximity to a big truck stop (I forget the name) was why there was early speculation that BW may have high tailed it out of there on a semi truck.
Just my recollection from memory - could be wrong.
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ETA: *Perhaps* the cell phone ping from Baldwin County (where DH was staying at the river house), which occurred prior to the very last ping in Mobile County, was the last confirmed communication with BW!?!?
In other words, someone may have confirmed they spoke with BW on the Baldwin County call rather than just a cell phone ping with no confirmed communication with BW on the Mobile County ping!?!?!? Just guessing on this and, again, based on my memory of the details.
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ETA: There used to be a very useful timeline created by FootballMom that included many of the details you are seeking. Don't know if it is still available here but it may be on the FB page with "truth" in the title. HTH!