Pat, I completely agree with DD1. Summer finally got here with a vengeance, and 100+ day's are gonna make it tough to germinate seeds for a while. Correct watering is gonna be the key.
I might look at Bermuda sod checkerboarded to cover more area. If you fertilize, I wouldn't go with the typical TX fertilizer blend of 30/0/10, 40/0/10, etc. I would go with a more even blend of 10/10/10, 13/13/13. Good root structure is what you're after right now, not a lush green lawn.
Here's what we did on the backside of our dam several years ago, and this grass took pretty well. Another plus was that the sod broke up the water flow, and stopped most of the erosion while the sod was settling in.
