Here is a resource that grew out of a need experienced by a father looking for a summer camp for his child with autism. His search led him to develop this web site with links to camps and therapy for children with special needs, and for respite care for families as well. The site is clearly laid out and features links to camps divided by regions and states within the US. It also includes camps in Canada, Central America and Greece.
The creator, Will Moore, a professor at Florida State University, also offers to put up a simple web site if you are a camp director and have no current web site. Some areas have more camps than others, but the whole US is well covered, regionally and by state.
This is an informative and easy to follow site, updated frequently, that should give families and caregivers, who are interested in camps some clear choices.