We sailed this lovely trip in 2019, arrived early in Nice and stayed at the hotel Scenic uses. We and others were picked up at the hotel and taken by luxury bus to Tarascon, a drive of a couple of hours. If you aren't staying at "their" hotel, you will need to contact Scenic to find out where they are picking up passengers in Nice and let them know you will meet them there. They don't seem keen to pick guests up at other locations, which is understandable.