I park my car at the airport at least ten times a year. In all the years that I have parked there the car parks closest to the terminal are hardly ever open (one time in ten max). I reckon only 50% of passengers use the bus service as its quicker (and less hassle) to walk if you have lots of luggage or kids in tow. Therefore you just need signs at the closest car park directing those that want the bus to the main road. Simple! Also, why cant the airport make it easier to get to the long term car park for passengers using trolleys and wheeled cases. There are hardly any kerbs with ramps on meaning most people walk on the roads which is dangerous. There are also wooden fences everywhere which you have to lug your cases over. Not pleasant in the pouring rain at 4am with kids in tow I can assure you. Simple fixes that would make the experience far more bearable.