I'm not trying to bash LE, but I do not believe they ever did a thorough search of the houses around the lake. I believe last time ollipop (is that the right SN?) posted they had still never been to his house. If they skipped his house or his house wasn't in their search radius, how many other houses on the lake weren't investigated?
Either they have evidence that the girls were taken immediately out of the area, or had no reason to pursue a thorough search of the immediate area and houses.
Police checked houses in the area where the children were last seen - on the East side of the lake. The poster you refer to lives on the West side of the lake, and there have been no reports of the children being in that area.