1) Adamite 2) Naturist 1) Bare one on the beach 2) Bare-skin enthusiast 3) Buff buff 4) Certain camper 5) Certain colony member 6) Certain tan fan 7) Clothing eschewer 8) Colony member 9) Debriefed person 10) Dweller in a certain colony 11) Hardly the modest type 12) Individualist 13) Kind of colony 14) Nature lover 15) Naturist 
[n] - a person who practices nudity for reasons of health or religion
nudist Someone who prefers to go without clothes, especially someone who spends time in communes or designated areas with others who feel the same way.
naturist noun a person who practices nudity for reasons of health or religion