Of course you can map out your preferences. The most important advice is not to plan an itinerary that is too ambitious and too specific. What might seem great on paper may actually hinder your enjoyment. Simply present your preferences to your skipper and crew and they will do their best to make it happen.
The winds and weather may affect routes, so definitely plan to be flexible. Your skipper will suggest an itinerary based on your preferences, his local knowledge and the weather. And even his itinerary may change depending on a number of variables.
In all cases, the crew, as experts will decide what’s best.