Hi Carol,
We stayed at Le Soleil de Crecy (www.campinglesoleil.com/en) a couple of years ago, although I dont think you would class it as particularly small as it has a fairly large static/cabin side to it. The mobile/camping side is not huge. It was about 10 mins drive from Eurodisney, and even organised coach tours to the parks and into Paris on some days. A good site with a nice swimming pool, and the usual crazy golf and small kids play area. We would certainly use it again if we return to visit Disney again. We only stayed for 3 nights last time.
David