NEW YORK — The basic summer camp wardrobe of shorts and T-shirts hasn't changed much over the years. But this summer, campers might need to leave a little room in their trunks for mocassin boots, skinny jeans (for girls and boys) and chunky jewelry.

Consider it the "Camp Rock” effect.

"Camp Rock” is Disney Channel 's new TV movie starring the in-demand Jonas Brothers . It could be this year's "High Schoo...