When at the Lake, for the WRC boat house follow signs for 'Sailing Club) - its the 3rd turning off the lane (i.e. next turn on left after passing public parking area & cafe). Follow track down - there is a parking area on right just before the Sailing Club; & walk through gate on left (just past playground) to access the Rowing Boat House among the trees.
For MultiMap, view and zoom into the map below
(or download as word.doc)