In theses cases, the director will normally set up a rotating schedule so the counselors can trade off times. Keep in mind this is only the actual camp time. There will also be meetings during the week to plan and set up. You can assume your student will be working 40 hours a week in Camp plus additional preparation hours. They will be tired at the end of the day.
Most camps have the weekends free.
Please keep in mind not all locations have personal transportation. Most people will have to walk or use public transportation to get places. A. Camp Adventure recommends cashing your stipend and getting Traveler's checks. However, ATM's are not available in all locations, so Traveler's checks are your best option. The only sites which require a visa are Bahrain, China, Russia, South Korea.