A good question.
A local answer.

Check the park's current official trail and access information before choosing a walk.

Compare time actually spent on the island after the ferry or flight with the stops you most want.

Pair one compact museum, garden or market stop with a relaxed meal rather than filling the day.

Plan from the scheduled landing through baggage, the actual transfer and hotel check-in, not only the flight time.

Check whether that particular shuttle still operates and confirm its latest pickup, drop-off and booking rules.

Reserve a table if the event is likely to be popular, and ask about age or entry rules for your group.

Save a longer walk or lookout for arrival if the detour would make the final section rushed.

Choose an inner-suburb food or street walk for the third day rather than borrowing time from the island.

Ask parking operators for written clearance, length and trailer rules for every vehicle, not just the largest one.

Check the park's opening and animal experience times before selecting transport.

Pick a short walk, viewpoint or town breakfast close to your first booked cellar door.

Reserve the small town or weekend night that would be hardest to replace and keep daytime stops spontaneous.