In reply to DH3631:
Haven't heard of any changes for this year, in which case yes, you should be able to park there. I did twice last year, once to do the 2 smaller marilyns (Beinn Dubh an Iaruinn and Meallan Odhar Doire nan Gillean) on a shorter walk, then again a few weeks later to do the 2 eastern Mullardoch munros of An Riabhachan and An Socach on a longer walk.
Feels very strange driving over the 2 dams; the second one feels quite narrow even in a normal car, it must limit the size of vehicle SSE can get to the hydro station!