I have booked the Princess Grand out of Galveston. Now I just need to get the plane tickets. We hope to use Houston Hobby airport. About what time should I plan my return flight. We will be using Galveston Limo shuttle service to take us to the airport. We would of course like the earliest flight out, without cutting it too close. I realize that Princess has not started these cruises from Galveston yet, but thought a past Carnival or RCCL cruiser would help. Thanks!