Bivouac

Noun

 * 1) An encampment for the night, usually without tents or covering.
 * 2) Any temporary encampment.
 * 3)  The watch of a whole army by night, when in danger of surprise or attack.

Verb

 * 1) To set up camp.

Adjectives for Bivouac
picturesque; solemn; miserable.

Thesaurus
anchor, barrack, barracks, billet at, burrow, camp, camp out, campground, campsite, cantonment, casern, colonize, come to anchor, concentration camp, detention camp, domesticate, drive stakes, drop anchor, encamp, encampment, ensconce, establish residence, go camping, hive, hobo jungle, inhabit, keep house, lines, live at, locate, maroon, moor, move, nest, park, people, perch, pitch, pitch camp, populate, relocate, reside, roost, rough it, set up housekeeping, set up shop, settle, settle down, sit down, sleep out, squat, stand, stay at, strike root, take residence at, take root, take up residence, tent, tented field

Etymology
From bivouac:, probably from  beiwacht:, biwacht:.