Thanks, still pondering "official". I think it's important to remember it's only in hindsight that LE discovered the homicides occured.
The next line under that link says this:
"Sheriff Tobe Leazenby said crews began canvassing the area and tried pinging the girls' cell phones into the evening hours but had no success in finding them. The sheriff said they believed the girls' phones were either dead or turned off."
There's also a YouTube video of an early LE interview where it's mentioned the search area trying to find the whereabouts of the missing girls was a distance 20 to 25 miles.
Other than family and friends walking the trails and calling out, and the fire dept searching the river banks, presumably in case the girls had fallen in, I'm thinking that more might be read into "official search" than actually occured. For example there was no reason for a thorough ground search looking for bodies to have taken place on RLs land, which is oft mentioned to support the "bodies moved" theory. However his land did border the river, where it was stated a search took place,