Sounds like great sets. After seeing both Mastodon and Opeth headlining shows in Austin last year I just couldn't justify driving down to San Antonio between two other concert nights.
7/19 - Mammoth Grinder
7/26 or 8/6 - Summer's Laughter
8/9 - Boris / SubRosa / Atlas Moth
8/25 - BAT / Shitfucker ?
8/30 - Morbid Saint / Vektor