We went to Paris for 5 nights last summer. We stayed at the Blois de Bologne in the centre of Paris. I went down the A1 all the way to Paris, then went round the Peripherique. I travelled on a Sunday and apart from it being "Black Sunday" when all europe seems to go on holiday.
The peripherique was very easy to drive round, you need a good map which shows all the exits and plan your route in advance. I didn't have any problems and I travel alone with my two sons aged 11 & 12.
The campsite was about 2 kms from the Arc de Triumph. A bus took you to the nearest metro station and then Paris was at your finger tips.