You've been reading (and believing in, as usual) too much trash. Texas is very lenient when it comes to growing and smoking pot. Yes, it's illegal but cops concentrate on violent crimes. We were smoking pot in concerts openly back in the late 60's, cops didn't care. I'm talking concerts I went to like Jimi Hendrix, Led Zeppelin, Zappa, Cream, Chicago, Santana...when music was music, not the canned marketed crap of today.
Check out the world famous ACL concert in Austin going on this weekend and next.
http://www.aclfestival.com/2015-lineup/