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If you want action for Houston, the warbirds will cut the corners of the ramp during photo passes. I feel like you are close to the action, but I also don't make it to any other shows to see what they are like. Lighting gets perfect after lunch, and our temps will be down, so heat haze shouldn't bother you too much. The only thing you may have issues with, could be the smoke from the pyro. Last year the winds were very light, the grass wasn't burned off well, and the field almost went IFR. I had to give up shooting on a few occasions because there was either nothing to see, or nothing photoshop would do to remove the haze.
I'll be there busy with the Vietnam jets, but also keeping the camera close. For the first time in 22 years, those of us with the Collings Foundation in Houston get to experience all of our local collection (minus the F-4) flying during the hometown airshow! I can hear the Blues doing their arrival maneuvers as I type.