Campsite, campground, and camping pitch are all related terms regarding a place used for camping (an overnight stay in an outdoor area). The usage differs between British English and American English.
In British English, a campsite is an area, usually divided into a number of camping pitches, where people can camp overnight using tents, campervans or caravans. In the US, the expression used is campground and not campsite. In American English, the term campsite generally means an area where an individual, family, group, or military unit can pitch a tent or park a camper; a campground may contain many campsites.
There are two types of campsites (US) or pitches (UK): one, a designated area with various facilities; or two, an impromptu area (as one might decide to stop while backpacking or hiking, or simply adjacent to a road through the wilderness).