I worked at camps for 7 summers. I have found that the worst staff to deal with are the ones who will constantly try to get away with doing as little as possible.
One summer we had one staff who would constantly try to to work. Apparently it was always either too wet, too hot etc etc to teach tennis and instead send the kids to another activity so that she could hang out on the patio.
I was admin staff that year and I got so frustrated when she refused to go down to the dining hall for supper one evening (we were required to go if you were not on time off)
These type of staff are the worst and take up SO much work