Of course the skipper is there not only to sail the boat but to coordinate both the wishes of his "guests" and their safety and comfort by taking in serious consideration the reactions/behavior/tolerance/skills of his guests onboard.

A typical day for the skipper is to sail from one island to another and include a 1 to 3 or 4 hour swim-stop to a beach/cove near or close to the direction of each day's destination. He should manage to do everything within his 8 working hours every day or so and after that to stay alert for the rest 16 hours of the day. Even during his 8-hour sleep, the skipper wakes-up and checks the position of his yacht and the whole situation (neighboring yachts, anchor chain, winds, etc.) - if required.
The yachts should stay overnight in port, though during one week charter, the skipper can agree and schedule one night "on the anchor" in a bay. He can also sometimes "teach" the basics of sailing and navigation to his guests and share his knowledge or give guidance about archaeological or other interesting sites in the vicinity.