Have you considered a hotel for the night before with parking included.What sort of distance are you traveling from?Train down the day before,hotel one night and short taxi run.Like you say,it is august and the prices are on the roof.We've looked at options many times and always end up with cps,our latest one on 2nd march,2 weeks,which is £160.All i can suggest is go to CPS,get a quote and go from there.Britania,two weeks in august with cps........£243.