Upvote:1
These ferry routes seem to change a lot, at this time (2023) there is no ferry scheduled between Toulon and Trapani while many websites do list this option.
If you want to go by ferry to Sicily best is to leave and navigate from Italy. And to drive there from Nice/Marseille.
Genova would be your best option, this is a 3-hour ride from Nice. (Though in summer this can be a busy route) If you ride to Rome (Civitavecchia) there are also many nice tourist things you can do in between!
All the currently active routes however are listed here (more of a guide), or here (where you can book). You have probably already been on this trip but for future people trying to visit Sicily, I think this is very relevant!