CMT's new Saturday night series, Bayou Billionaires and My Big Redneck Vacation, have been renewed for second seasons. The shows debuted in January to record-breaking viewership and have become the two highest-rated original series in CMT history. Bayou Billionaires stars the hardworking and close-knit Dowden family of Shreveport, La., who struck it rich when the fourth largest deposit of natural gas in the U.S. was found on their property. My Big Redneck Vacation, hosted by Tom Arnold, follows the extended Clampet family as they experience the vacation-of-a-lifetime in the Hamptons. Both series will conclude their first season with premieres on March 31. The second seasons are scheduled to premiere in June.