In reply to jonny taylor:
There's an overflow car park just before you get to the Linn of Dee bridge. If it's judged that the car parking beyond this point is full, you will be directed to the new car park. It's less than 10 minutes walk from it to the normal car park, so no big deal. We turned up after 2pm on Saturday, and there was space in the overflow car park. We wanted to go to the Linn of Quoich, but had brought bikes, so no problem. We were away overnight, and it wasn't an issue leaving the car there.