The only caravan i could think of that could be towed by your peugeot is the teardrop caravan. They are extremely light and can be towed by a small car. The ones that i have seen sleep 2.I saw some on ebay, you could try there.
Depending on how many people you want to take with you, a bigger car would be better for towing a proper sized caravan, and also a higher CC.
Hope this helps.