You are not alone
The AAIDD Humanist Action Group has the mission of supplying humanist information on ceremonies and resources that might be useful to people with and families of people with intellectual disabilities. The American Association on Intellectual and Developmental Disabilities  (formerly the American Association on Mental Retardation) approved its application in February 2006 Humanist viewpoints however do not necessarily express the opinions of the AAIDD and other viewpoints can be accessed through their website: www.AAIDD.org Just click on the green button above to enter the humanist site
Humidd.org will get you here too!