a person who spends a holiday living in a tent or at a holiday camp 野营者；露营者；度假营营员 - (also camper van)(both British English)(North American English RV, recreational vehicle)(also motorhome North American English, British English)
a large vehicle designed for people to live and sleep in when they are travelling 野营车（供旅行时居住） 
- (North American English) (British English caravan)
a road vehicle without an engine that is pulled by a car, designed for people to live and sleep in, especially when they are on holiday 旅行拖车，宿营拖车（无发动机，由其他车拖动，多供度假时住宿用） 
Idioms
not a happy camper
(British English also not a happy bunny)
- (informal)
not pleased about a situation 对境况不满意 She wasn't a happy camper at all. 她一点也不快乐。