Hi A. -
My family moved to AZ 2 yrs. ago and found an organization called the MOMS Club. It's a club of stay at home moms, and moms who work part-time. They have a monthly calendar of events as well as age appropriate playgroups. It's mostly for the moms, but they do have occasional family gatherings. They have different chapters for the cities. If I remember correctly, you can log on to: momsclub.org and type in where you live and they email the contact information of the chapter you live near.
Also, I know of a club that will be starting up soon for families that live in the West Valley, and I should be getting some information about it in a few weeks. I would be more than happy to forward that information to you once I receive it.
Welcome to AZ and enjoy every minute with your special boys!!! :)
S. S.