Thanks for all the help. We booked our FF miles… into Rome, out of Munich. Yes, I know it will be very busy. DH and I hope to return for a more leisurely Europe trip someday after retirement, For now we are excited about our last hurrah family trip - kids are 23 and 26. We’ve been to Ireland together, but never mainland Europe.
This week I am researching accommodations - Rome (4 nights, probably VRBO), Venice (1 night - splurging to stay in Venice itself), night train, Munich (4 nights).