I’m really wanting to drive over again soon, we flew last time and it was a PITA. Especially trying to get my girlfriend though Geneva airport in a wheelchair with a broken knee on the way back!
We used to drive down from Lancaster to go skiing once or twice a year and it worked out a similar price overall (for the 3 of us) as flying but you have the flexibility of choosing resorts and moving to others once there. We generally had an overnight stop around Macon on the way down and did the return in one go with 2 drivers, usually around 18 – 19 hours door to door. Always tried to hit the M25 at night too so as to miss the traffic.
We also used to stop in the valleys as you get proper little french hotels rather than the concrete monstrosities in some of the ski resorts! If you do hire a car from Geneva airport if you hire it from the French side it worked out cheaper when we booked, just make sure you return it to that side otherwise we got charged £90 for them to drive it the 200yds from the swiss side back to the French side 😕