Cathy,
Great news! I got there 2 days before my surgery. Day of arrival, check out city, next day - admission & pre-op stuff, day of -discogram and surgery. In hospital 9 days, 1 1/2 weeks in hotel, was supposed to be 4-5 days in hospital and the rest in hotel but.... Probably safe to arrive on the 24th. Earlier and you'll have some time to see the sites. Check with Dr. FM.
Leave day before arrival date, to arrive midday??? Should give you plenty of time to get your bags, drive from airport to Straubing, check into hotel, dinner and a little site seeing.
Didn't know about the 2 airports
Don't let the heebie-jeebies get to you. They'll disappear on the 26th
.
Good luck to you, Dale