I've kind of done things backwards this time around. We're traveling by train to Valence and then picking up a rental at the TGV that we'll use for a couple of days as we travel around Southern Rhone. The rest of our trip has us going through Switzerland, Austria, Slovenia and dropping the car in Itlay.
The challenge I've run into are the costs accositated with picking up a rental in Valence (or any other sizeable town in the vicintiy), driving into eastern europe and dropping in Italy are prohibitive, if even doable with most rental agancies. The option I've been able to work out is to rent an Avis car in Valence and return to the French side of Geneve airport and pick up another Avis on the Swiss side of the ariport to continue our journey.
My question is if anyone has dealt with returning a car at the France side of the airport, then cleared customs/immigrations and headed off into Switzerland. I'm trying to determine how much time/hassle this will be.