[Closed] Sacre bleu!.. Cest Bastille day on Saturday. Best route around Paris

Driving down to Andorra on Saturday 14th(this one coming) and its Bastille day it would seem.

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Its unlikely I can persuade the French to hold it on another day, and Paris and the surrounds are likely to be gridlocked a bit, so what route would you take from Calais to avoid potential mayhem with Andorra as the ultimate destination?

Initial plan was to stop and find a campsite around Orleans Saturday night then carry on Sunday. Best route for mayhem-avoidance, cheapness of tolls, and swiftness of movement...