Water bowser was out every hour or so but wasn't too bad dust-wise unless you were standing under the trees by the before the start line. Wind kept most of the dust off the parking field which helped
I watched the last race, then went straight back to the car and left. Was out on the main road within about 10 minutes, so not bad at all. Easy run home other than the 20 minute queue on the M2 caused by someone face-planting their Corsa into the back of a Honda CRV....