I was wondering, is there a link between the villagers that appear at the campsite and the villagers that move into your town?
If you talk to a villager in a tent does it make them more likely to move in?
It could be if you talk to them often enough, it will convince them to move in.
I had a camper move in not long after he had visited my town and had talked to him a few times while he was visiting. He became my tenth villager.
There was also a long gap between the ninth and tenth villager moving in.