Just tell them that this is your dog's day job and ask if they'd to help him get started in his career. :)
I lived in a town where growing up where the town hall would have sirens going off at noon... we had a german shepard who loved to howl at the sirens, he would put his feet up on the windowsill, put his head back, and let us have it. it would go on and on just like your dog.... was one of the things we loved best.
If your neighbors in the new community don't like him howling, f* them.