My number one, not-to-miss 2013 Carnival occurrence will take place Saturday (Jan. 26) in the Bywater and Marigny neighborhoods, as two of the Crescent City’s premier post-Katrina do-it-yourself parades, the Intergalactic Krewe of Chewbacchus and the mini-marching parade formerly known as ‘tit Rex (a shortened form of Petit Rex, inspired by the venerable Rex parade and pronounced like the dinosaur), will roll through the narrow streets.