I agree. It is N625W, not to be picky with just a typo. Anyway, probably N625W ends where the blacktop stops and it is a private road on from there to where it dead ends at the house. I posted some pix of the road earlier today to show the road and hope you don't mind me posting a couple over again. Stills from one of Gray's videos. When I saw the LE vehicles there I thought as you, that it was a key factor in understanding more of how it might have gone down.
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What caught my eye is that they primarily seem interested in the area from the road up the hill to the end of the bridge, not on down the hill to the creek. As far as I saw, they only had that area between the bridge and the road taped off for the CSI and the area where their bodies were found. Maybe this is where they were dropped off especially if Libby's sister went by Abby's to pick her up and then they were dropped off. Or even if they were dropped off on the north side maybe that is where they were going to be picked up. I wish we knew who was supposed to pick them up as I think that's a key. LE stated Libby's sister dropped them off and a family member was supposed to pick them up. Don't you think it's meaningful they would say who took them but not who was picking them up?