Wish I had known about this earlier!
I should probably have posted about this since I knew about it 2 days ago… My bad!
Yesterday on the second day there was a negative travel advice towards the airbase/airshow due to the massive amounts of traffic, all parking spaces(just meadows) had been filled up, so had public transport. Someone that came from the south of The Netherlands was travelling 6 hours. 3 hours to get there, 3 hours to get to parking/airbase. Ridiculously popular this year.