More Swallows and Amazons here too... I even hired a small motor
boat for the afternoon in my early 20s to visit the island in the middle of Windermere in the Lake District. On the island, apart from being heavily wooded, there's a disused/abandoned rope
and tire assault course and a fine anchorage in a bay hidden from view on the opposite side of the island from bowness-on-Windermere.
More recently i've been enjoying each and every Master and Commander novel in order. I haven't, however, managed to hire a 2nd rate ship of the line to pursue the fantasy!