Evening ferry crossings to Islay I think often provide the best views, like this one from a crossing in April 2016. On the way to Port Ellen the MV Finlaggan is approaching the Oa, a crescent Moon low in the evening sky not long after sunset.
A beautiful clear April night on Islay, the low full Moon just over the horizon reflecting brightly on Loch Gorm, thousands and thousands of sparkling stars in the night sky above.