It's in their job description. By doing a little bit of legwork and some reading between the lines, you can tell a lot about a camp, academic program, or travel group before you sign the dotted line. Get brochures from a variety of programs. Arrange a tour or visit.
Many programs invite families to visit their facilities during the session or off-season.
If you can't work in an on-site tour, ask if the program offers a video. Many communities also offer camp fairs where you and your parents can meet with program directors in person.