PSN info is here:
http://www.pontiacsouthernnationals.com
DAPA is here:
http://www.dapa.org
When you go to the DAPA site click on the "dapa membership" link on the left side. Click on the membership form and print it out. Fill it out, attach a check and send it to the address indicated. Since we are into the year the rate to join is reduced (see the rate schedule). I finally got off my rear and joined last week and hope to make my first meeting in june.