[Вячеслав Киреев]

Читаем, как это называется за границей:


Webster's New World Dictionary (EN-EN)

trailer
n.
1. a person, animal, or thing that trails another
2. a cart, wagon, or large van, designed to be pulled by an automobile, truck, or TRACTOR (sense 2), for hauling freight, animals, a boat, etc.
3. a closed vehicle designed to be pulled by an automobile or truck and equipped as a place to live or work in, as one with beds, cooking facilities, etc.: see also MOBILE HOME 4. Film
a) so called because originally attached to the end of a reel of film an advertisement for a feature film, typically consisting of brief portions of scenes from that film
b) a blank length of film at the end of a reel
vt.
to pull or tow (a boat, car, etc.) by using a TRAILER (n. 2)
vi.
to travel by using a TRAILER (n. 3)



trailer park
n.
an area, usually with piped water, electricity, etc., designed to provide rental space for trailers, esp. mobile homes to be parked for a long or short time

Если коротко, то это трейлер.
Кемпинг - по американски это просто лагерь, для бойскаутов, для военных для туристов и т.п.