Game concept
Camp
The game also links it as Camps, Adventurer Camp, Adventurer Camps.
From the game's encyclopedia
Camps are a portable mess of tents, pack animals, and people. They vary in size from just a small circle to great roving armies.
Each Adventurer has a Camp Domicile which moves across the map with them.
Camp Upgrades may be built here, which provide powerful bonuses to the Adventurer in lieu of Counties of their own. Followers, like their Family and Knights, travel with the Camp, and may be appointed as Officers.
Like Courts, Camps include some nameless Characters not important enough to portray — albeit less of them.
Even when not Traveling between Counties, Camps are generally not static in the Location they're in, and will move around every few nights.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Camp is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Camps are a portable mess of tents, pack animals, and people." It is part of Domicile. It covers Camp Temperament. The game also links it as Camps, Adventurer Camp and Adventurer Camps. Patch 1.20.1.2, from game/common/game_concepts/07_ep3_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/07_ep3_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.