Very Special Camps lists camps and programs for people with special needs around the country; you can browse by disability or by state.
My Summer Camps lists camps by disability, which you can then filter by state.
Easter Seals Disability Services has 30 accessible camps around the country—for adults, too.
Federation for Children with Special Needs lists camps for kids with special needs by disability.
Cristo Vive International provides Christ-based camp programs for children with disabilities around the world; there are a few locations in this country.
Serious Fun Children's Network is a global community of 30 camps and programs for seriously ill children, founded by Paul Newman. Some accept children with cerebral palsy; Max has been to the Double H Ranch in Lake Luzerne, NY.
One Happy Camper lets you search for Jewish camps with inclusive programs. Ones I can vouch for: Yachad's summer program (in NJ) and the Ramah Tikvah program (in NY, PA, MA, GA, CO, WI, CA and Canada and more), which are both inclusionary. I have also heard good things about Camp HASC in Parksville, NY, which follows IEPs.
Check your local Kiwanis Club, as the group has some camps for children with disabilities.
A couple of notable camps for children and teens with special needs in the tri-state area, my neck of the woods: Southampton Fresh Air Home in Southampton, NY; Elks Camp Moore in Haskell, NJ; Camp Fatima in Harrison, NJ; and the Helen L. Diller Vacation Home for Blind Children in Avalon, NJ. Victory Junction, in Randleman, North Carolina, a camp for kids with serious illnesses, offers a week for campers with cerebral palsy in early June.
Image: Flickr/Kris Krug