Add to this people would more likely use Bebside than Ashington. Even known it's slightly further distance wise, it's much quicker to get to as it's just off the A189 and is the last point really before the traffic really starts; Moor Farm, Haddricks Mill, Gosforth Park, Coast Road etc, depending which was you go.
Ashington is a bit of a pain to get out heading North as you have to head South and drive around some local streets to get out the car park.
Wouldn't be surprised to see some people off the A189/A1068 corridor use it; ie. Newbiggin, Lynemouth, Amble, Red Row, Widdrington etc.