Hillbilly Bob Brewer has no track record. Bob Brewer has not recovered any treasures...
Bob Brewer filmed that Brad Metzger "DECODED" Confederate Gold episode at the Danville Cemetery in 2010 and it was aired in December 2010.
Brewer was standing in front of a Beech "talking" tree, and explained the meaning behind the KGC symbols that would lead to caches. No mention of a grave with maps.
Three years later in 2013, a newspaper article with you in front of the same Beech "talking" tree photo providing a different meaning of the same KGC carvings, mentioning the grave with the KGC depositories location map.
So what we have are two different interpretations of the same symbols on the same tree, similar to all those claimed "solves" of the Beale ciphers, proving that all these symbols interpretations are based on the expectations of the beholder.
One fact in Brewers favour, is that he did recover a KGC glass canning jar cache of gold and silver coins in Brushy Creek, Arkansas and several other small caches from his reading of KGC symbols.
Most likely, it appears that KGC caches fit the pattern of these glass canning jars filled with coins, and are not large depositories of wishful thinking.