Oasis

CCFA Camp Oasis is a co-ed residential camp program seeking to enrich the lives of children with Crohn's disease and ulcerative colitis by providing a safe and supportive camp community.
http://www.ccfa.org/kidsteens/camp

Canadian Ostomy Youth Camp (Camp Horizon)

Provides an opportunity for young people aged 9-18 who have ostomies or other special related needs (intermittent catheterization; urinary or bowel incontinence; internal pouch; Crohn's disease or ulcerative colitis), to attend camp and participate in camp activities under professional supervision, with consideration to emotional growth and maturity.
http://www.ostomycanada.ca/camp.htm

The annual Youth Rally (http://www.rally4youth.org/) in Boulder, Colorado, linked with the United Ostomy Associations of America (UOAA), is from July 7th to July 11th.

Celiac Disease Foundation

A child on a gluten-free diet may have difficulty at a mainstream camp, but shouldn't miss out on the experience!
http://www.celiac.org/kidskorner.php#camp

Gluten Intolerance Group (GIG)

GIG Kids Summer Camp programs at Camp Kanata and Camp Sealth.
http://www.gluten.net/events.htm#camps

Camp Celiac (Celiac Sprue Association)

North Scituate, Rhode Island.
http://www.csaceliacs.org/CampCeliac.php

The Zajac Ranch for Children

The Zajac Ranch for Children's objective is simply to "raise the spirits" of children with life threatening or chronic illnesses and/or disabilities.
www.zajacranch.com