OK, throw away the controle technique thing it's useless unless you want to make an appointment to have your car inspected in France this year.
Carte conjoint, give it to your wife but realise that if her car breaks down in France, she'll have a hell of a wait for assistance to arrive
ACO enclosure: Well that is not too bad, no very long lines and slightly cheaper and different food and drinks than anywhere else.
Furthermore an hourly update on the standings and various screens to watch the race.
Beware however, the ACO-enclosure has no airconditioning, when the ambient temperature is above 15C avoid it like the plague, it will be too damn hot.