Cardiff is brilliant for GA. Friendly ATC. Pay your landing fee southside at the flying school. Landing fee for our 172 £22 odd. Don't know what you would pay for parking for 6 hours. Give Cardiff Academy a call on 01446 710000, then decide what to do. The published VFR arrival and departures are in the flight guides, so not too daunting. My favourite "big" airfield to visit.