Very tragic, and sad for the family. And a big thank you to the volunteer searchers.
Ennis Chief of Police John Erisman confirms to Channel 8 News that Wade was found dead in Chambers Creek off of Ensign Road near a low water crossing.
The the upstream tributaries of Chambers Creek are to the south and west of Lake Bardwell. I don't think any of the roads she would take to get back to her Mom's place cross water/streams that would end up in Chambers Creek. Most of the stream water around Ennis appears to flow into Cummings Creek, running kind of parallel to Chambers Creek. Image with pin point of Ensign Road/Chambers Creek intersection. Upstream areas of Chambers Creek circled in red (as best that I can estimate from Maps.
Most likely she took an unannounced drive somewhere not expected. Maybe she took a drive around Lake Bardwell before heading home. But I remain a little skeptical.