The problem with the story is one of inflation. $30,000 in 1865 would have been the equivalent of 45 million! So a Missouri farmer in the CW era had the equivalent of $45M laying around in gold that he decides to bury.
I love seeing the old newspaper treasure stories. Some of them are absolutely true. You just have to analyze the details and situations to figure out which ones are worth chasing. Always keeping in mind that newspapers have never had a problem with printing anything or changing any details to help sell copies. Maybe the story is completely fake. Maybe the truth was $300 in gold but that didnt sound exciting enough.