How to translate a non-recreational but activism/protest "campout"? How to translate an activist campout (as in a protest site where people also camp)?

The full sentence I would like to translate (it would be great if you could help me out):


  The activists feared that the police would destroy their campout
  before the first anniversary of the inauguration of president 蔡英文 on
  May the 20th.
激進分子怕警詧在蔡英文五月二十日的總統就職一周年之前搗毀他們的露營抗議活動。