THE PILOT WAS ATTEMPTING TO LAND ON THE NARROWEST PART OF THE LAKE. THE LAKE WAS SHAPED LIKE THE SOLE OF A SHOE. THE WIND WAS FROM THE WEST AT AN ESTIMATED SPEED OF 15 TO 20 KNOTS. JUST PRIOR TO TOUCHDOWN THE AIRPLANE DRIFTED RIGHT AND THE RIGHT FLOAT STRUCK A BEAVER HOUSE, THEN THE LEFT WING DRAGGED THE WATER FOLLOWED BY THE RIGHT WING. THE AIRPLANE REMAINED AFLOAT AND THEY TAXIED TO SHORE. THE PILOT REPORTED NO MECHANICAL PROBLEMS.