Glenn Springs is tough tough to fish offshore. I've tried it and you have to fight through some heavy brush just to get to the shore. The grass makes it a challenge too. Nearly every retrieve comes back with the grass. I'm in the same situation as you- looking for any advice on how to fish Glenn Springs from the shore. The rocky dam had some promise, but I do not think I had the right bait. I was throwing crawdad crankbait in January, with zero luck.