Drove the Tesla 3 to College Station from Austin.  Charged it up to the full 300 mile range, figuring it would be enough for the 105 mile distance and back.  Turns out a little extra driving, maybe some dependence on speed, wind, hills rounding error led to us getting back into Austin with less than 50 miles on the battery.  Except we spent maybe an hour and a half charging up at the sad little charger at the back of the George Bush Library.  Probably added 30 or 40 miles.  We would have made it anyway, but it would have been close.  I guess the lesson is charge when you can and be conservative in your estimates.