"...Turn left. The field is closed for an RV mass arrival." !!!!!!! Wow, solution / problem? No reason in the world that they should have closed the field, but if that is how it is going to go, we should be aware of it and be part of the real solution. None the less, it DID happen. ATC closed the whole arrival ("30-45 minutes") because 30 RVs were approaching in a coordinated fashion. Unacceptable any way you cut it.