Loch Druidibeg, South Uist
Druidibeg is a freshwater loch on South Uist. It has good trout fishing, and although it isn't one of the classic sea trout lochs on the island, it is possible to catch the odd sea trout which has made its way through the system.
It can be fished from the bank, and there are also a couple of boats available.
Details about fishing availability and permits can be found here: http://www.southuistfishing.com/