In reply to keith-ratcliffe:
I was in Paris the weekend of the finish in 2014, although more for my wife's birthday treat on the way home from the Etape than the actual race.
We stayed in Holiday Inn Express Paris - Canal De La Villette, which was very nice in the evening, although somewhat noisy at night from the nightclub underneath it. One of the main reasons was it had a secure car park so I didn't have to worry about my bike in the car - it's underneath the hotel and very tight, but managed to get in and out with no scrapes.
It was a pretty easy ride from there down to the course in the morning - you can ride around a lot of it until they start closing bits of it to finish setting up. Alternatively, you can get the Metro from the hotel and walk.
Sadly, we couldn't stay to watch it live