You could add a social profile gadget or subscription form gadget to provide additional ways for visitors to contact you.
The more clear your contact information is, the more more likely people will contact you with their questions.
Place your address here:
PO Box 18612 Huntsville, AL 35804
+1 (256) 804-8533 http://hsvppa.com
You can include here an interactive Google map with your organization address instead of this text block.