The Federation for Children with Special Needs has a comprehensive list of camps for children with a variety of disabilities
http://fcsn.org/camps/listing.html

Other resources on line:

http://www.spedchildmass.com/camps-special-needs-massachusetts-autism-aspergers/
 
http://www.flutiefoundation.org/fun-sun
 
http://www.specialneedsma.com/camp list.htm

http://adamscampnewengland.org/

If you are aware of other camps that have worked well for your child, please let us know and we can add to the list!