The road goes behind an embankment at the end of the runway, so it's quite easy to park the car and walk up the embankment.
I'm not sure how they treat spotters at present after the bombings in London. I assume anyone loitering near an RAF airbase would come under suspicion.
I've not been up that way in a couple of years, I don't even go the the airshow anymore, nothing of interest ever turns up.
I think the last time I was there a number of F14s were parked at the end of the runway. I'm sure the last airshow I went to the IAC aerobatic team carried out their last UK airdisplay.
Alex