D defs.my
Entry 3 senses Webster, 1913

Camper

/kăm'-pẽr/ · Camp·er · IPA /ˈkæmpɚ/
01 n. One who lodges temporarily in a hut or camp, especially who sleeps in a wilderness for recreation.
  1. 1.
    One who lodges temporarily in a hut or camp, especially who sleeps in a wilderness for recreation.
  2. 2.
    A person who stays at a summer camp or day camp.
  3. 3.
    A vehicle, such as a small truck, or a pickup truck with a hood over the back, equipped for convenience while camping out.
Phrases & compounds
happy camper — a person who is pleased with the situation in which s/he finds him/herself. Often used ironically or in understatement, especially in the negative; as, the passengers left behind on the island were not a bunch of happy campers.