There's 2 Time Team shows about crannogs. One is a special about Loch Tay and the other is a cracking epsiode filmed on the shores of Loch Migdale. They find a henge and a toppled standing stone which was aligned to the setting sun and a notch in the hills.
They also rediscover the spot where the bronze age Migdale hoard was found. They're both watchable on 4OD and others are on you tube. Well worth downloading