I drive to ODG, getting there at about 8.30 am - parking is not a problem at that time. There is of course the much larger car park at NDG if the one at ODG happens to be full. And one of the farmers has opened up a large field at NDG for parking at £5 a day.
On the weekend, or on a day with a good weather forecast, ODG is usually full when I get back, but it wasn't yesterday.