I don't know where in New Hampshire your brother is living, but I found three other dojos (not in your original post) in three different cities (Sanbornton, Keene and Portsmouth) of New Hampshire. I found them in the dojo listings of my last Aikido-east (USAF-east) newsletter. The details and contact info can be found on the USAF web site
http://www.usaikifed.com
It does not seem that choice is lacking in the state of New Hampshire when it comes to aikido!