I'm planning a long weekend in Marseille to hike the Calanques. The initial plan was to go from Marseilles to Cassis along the GR98 which looks to be about an 11 hour trek. With 10 people of varying abilities, it seems a bit ambitious for one day but it doesn't appear that there are accommodations along the way in order to break it into two days.
I've since decided that we'll stay in Marseille and take the bus to a point about mid-way and hike to Cassis one day and Marseille the next - is that the best approach? Additional recommendations for treks or other activities in this area are welcome.