Fastpaddler,
The carpenter ants are suckers for Terro poisons as well. I battle them all the time in our house. It is kind of fascinating watching a lock step, steady to and from stream of carpenter ants devouring little puddles of Terro. It goes on for about a day and then they are gone. The problem with carpenter ants is they can nest in your house and not necessarily come from outside nests which are more common. To nest they are going to have to have a source from which to live, celluose and water. That would be hard to do in a Class B van made of a steel body.