We are in the early stages of planning our Texas trip, which will start in Dallas. A couple days there with family, and then we will head to San Antonio. Those are the two cities that we had originally planned to see. Now, after reading up on Texas, I have considered stopping in Fredericksburg for a couple of nights on our way to San Antonio. Then I thought, perhaps, Austin for a night or two on our way back to Dallas. Now, I see the Corpus Christi area, and wonder if I should add a couple more days to our trip. If I could get some advice, I'd really appreciate it. We will be 4 middle-aged adults, and we have about 8 days. (flexible) What should we really see and what can we skip?