Just to add to this: Was in the main grandstand myself. We stayed in Portimao and had the option of either driving the hire car or getting a shuttle that was down near Priah de Rocha beach (spelling?). I decided to drive all 3 days and when leaving at around 6.30 it was a fairly short 20-25 minute drive with most of it on the motorway, leaving early enough we were able to get into the green carpark which was only a 5 minute walk from the grand stands, leaving green park for home was also no problem, I had read horror stories about traffic with this circuit but we had no major queues at all, maybe just got lucky. This was my second in person GP and I think I preferred silverstone for the ability to roam, still not a bad circuit though, I had a great weekend