You may find it hard to find camping entertainment jobs too in Switzerland. I haven't seen any entertainment in most of them. Unless you find old people throwing petanque balls around entertaining.
Camping Fraso-Ranch 2523 Lignières did have good activity for the kids when we visited a few years ago so you may want to contact them (pretty much all the guests spoke Swiss German) http://www.camping-lignieres.ch/
& their site is in English.
The TCS Signal in Orbe also has theme days/evenings.
Certainly nothing like what you would expect in English or French campsites.