Secure It Easy Somewhere To Park, North Of Paris, Secure And Easy To Get To From Paris On Public Transport Please.?

Somewhere to park, north of Paris, secure and easy to get to from Paris on public transport please.? - secure it easy

The question says it all develop, but a little. I ride in Paris by necessity. I park the car somewhere on the periphery, which is inexpensive, safe and easy travel to central Paris by train or bus. Within or outside the ring, not really that interested, as long as it is much cheaper than parking in the middle. I will be there from Saturday until Tuesday. In the north is better that I come from that direction. Thanks.