There are many option there some might suit your need. For example take a break during driving home there the time of charging is now 30-40 minutes for 80 percent and you might not need that much power to get home so you can do it more quickly or choose a slower charger if more convenient. That many charger are close to restaurant so you can have a meal break.
Your grandkids might also have a charger there they live that you can use.
Or you can find a parking lot with a slow chargers in Austin that you can use. So you park the car there and your grand kids come and pick you up and drop you of then it times to go home with their car and you then have enough power to get home.
Or you get out to eat with your grand kids or do something else and park you car at a charger station at that destination. Or you take an extra car so that you can park your car at a charger station and you can go with one of your grand kids in her/his car the last distance to your destination.
There this is also a map of super chargers for Tesla and there might be a lot of other charger that you can use.
supercharge.info
Also you are now seeing both a massive build out of charging station and also soon get charging times of 20 minutes or less. Also many people can save time because they can charge at home or at work for most of their daily trips instead of going to a gas stations.