Thanks for all the great advice!
Our plane lands at 1 pm. It's a 30 minute drive to our hotel. I have a driver we hired to pick us up and they said we should be ready to be picked up by 2 pm. We will go through passport control in Paris as our first entry into the EU, before we arrive in Rome. Will that speed things up any?
We are staying near the Vatican. Perhaps a stroll through Travestere after we settle in, and an early-ish dinner, will be all we have the energy to handle.
My husband and I have been to Europe before, and to Italy. I'm trying to balance our days with one tour, at most, and then free time to do other stuff as we feel the urge. We have done the RS heart of Rome tour before, on our own, and that was quite nice. I even have that down as a possibility for us for that afternoon. I think you guys are right - no official tour with a guide, just do our own thing.
We usually plow right through all day the first day in Europe, and then crash for bed by 10 pm and get on the local time schedule by the next morning. Naps are the worst. I hope no one insists on one the day we arrive. We are six hours behind Rome time at home, but we will have slept some on the plane. Not too much tho, just 8-1/2 hours from Cincinnati to Paris, so that won't give time for more than about 5-1/2 hours of sleep after dinner and before they serve breakfast on the plane.