Originally Posted by
Canarsie
No matter where you go to view a total solar eclipse, be sure to allow between double and triple the time to return once the eclipse has concluded.
Exactly this, and consider that if you go into the Hill Country, many of the roads are 2-lanes (one lane each direction), and can be windy. After all, it is the Hill Country.
I would suggest Marble Falls, it is one of my favorite places to go in that area. But if you want to get out in a hurry, I have a feeling it will be gridlock leaving.