There is another solution.  

Gather all the U of O participants, take them down to that island and leave them there by themselves with water and military rations (MRE's) until all of the trash is cleaned up, however many days, weeks, or months that takes.   For the meatless types, there is the 'Humanitarian' version.

Their daddies can pay the $85 per case for the MRE's, of course.

"Shelter" consists of whatever was left behind.