Here are some websites that have games & activities and books for camp staff:
http://www.acacamps.org/staff/games/
http://www.funattic.com/game_list.htm
http://www.yardgames.150m.com/
http://www.ultimatecampresource.com/
https://www.titlemax.com/resources/card-games-for-car-road-trips/