What time will your commute be? I drive from Kemah to Austin every Monday morning. I can drive all the way across Houston at 70 mph, but I start at 6 and am clear of Houston by 7. If I tried leaving at 7:30, I bet it would take considerably longer.
I can be pretty flexiable with my commute times. I can leave around 0700 or wait until 0900.
Is there any other Marina options closer to IAH. I dont mind a 30-45 minute drive one way.