Our campers are not allowed to use their cellphones while at camp. They are at camp to participate in the here and now not the there and now. If we find a camper using a cell phone for texting or calling we take it away and lock it up in the camp office or the counselor keeps it until the end of session.
It is clearly stated in our camper covenant what the policy on cell phones and electronics are at camp.
The only exception for use of a cell phone is as an alarm in the morning or during rest time. In this situation the cabin counselor can return the phone in the evening and retreive it again in the morning.
Hope this is helpful