I am planning a trip to Houston end of Feb 2014 for 4days. Will be flying JetBlue. Is it necessary & convenient to just hire a car rental OR the public transportation is easily accessible and cost effective. Plan to take up the City Pass which offers attractions to the Downtown Aquarium, Space Center, Museum of National Science, Kemah Broadwalk & Museum of Fine Arts. If hiring a car, would the parking fees be expensive? It's my 1st time in Houston & looking to explore possibilities in regards to transportation.