Dry-ice-bat
Merengue's my life.
title says it all. i need to know ASAP.
Nope
Yes you can, just invite another villager in, from another town. This will cancel the camper.
Edit: Perhaps inviting someone from a new town to come in will stop it, but I've never tried it and I don't really know.
1 option: don't talk to them (do not invite them), go in have a look and get the heck out
2 option: get another villager to move in asap if you have 9 (like roseflower said)