We will arrive SA airport Thursday Dec 5 for an 11 night visit. We want to spend some time seeing the museums and missions in San Antonio and enjoying riverwalk. We also love hiking and birdwatching and are attracted to the idea of spending some time at Big Bend and/or the Gulf Coast (Port Aransas area?). However we do not want to spend too much of our vacation driving. Big Bend seems special but I'm not sure about the 6 hour drive. There are rooms available in the park so we would stay there. Any suggestions for an itinenary will be appreciated.