A good question.
A local answer.

Check baggage collection, domestic recheck and transfer requirements first, then work backwards from the second flight's check-in deadline.

Check current menus for mains, drinks and any weekend surcharge so the total matches your budget.

Compare the total storage charge with your time away from the station; short opening hours can make a cheaper option risky.

Use the current ferry map to make a simple out-and-back route with a meal stop rather than changing services repeatedly.

Check whether your credit-card benefit covers a prepaid pass and whether cancellation is possible if the flight changes.

Book any required gear or guided activity first, then make sure the final ferry leaves enough time for a relaxed return.

Combine one short waterfall or lookout walk with a food stop, rather than stacking several small shops into the day.

Check current national-park access and weather before leaving, and avoid planning an unfamiliar mountain road after dark.

Start with the motorhome company's actual pickup and return cities, one-way fees and permitted travel area.

If the match finishes late, an overnight stay near a straightforward transport route may be more comfortable than a long drive home.

Allow generous return time to the ship and check walking distance, seating and step-free access for each stop.

First confirm the terminal, luggage arrangements and airport check-in window; those decide how much city time is realistic.