How Charles and Camilla behaved, as you put it Newquay was no different to the way three-quarters of the population behave! Diana was no saint, the marriage failed as do so many, Charles found happiness elsewhere, as do most people, so what?!
Some people may want dreary colourless head of state driving around in a bullet proof car, but many more people don't; the cheering flag waving crowds will tell you that! Whatever any one thinks, pulling in the crowds = pulling in the money! Other heads of state don't come close. I for one love the pageantry, the marching soldiers, the horses, in fact the whole shooting match! As for William. Edward V11th who behaved so badly as PoW, turned into one of the best monarchs this country has ever had, so don't be so judgemental. He is clearly a devoted husband and father, takes little or nothing from the privy purse, and, how he conducts his future is the business of the family.