Just pick a weekend a few weeks out. Say, early to mid-May. It should be dry by then so we don't get covered in mud, or get our vehicles stuck in it. Get enough people committed, and a BLM big dumpster....we'll whip that place into shape.
weekend May 17/18/19?? Fri/Sat or Sat/Sun??
That will give BLM enough time to coordinate support/logistics, enough time for us to get the word out and plan for it.
Doing it over 2 days would allow different people to show up, so its not limited to one day and who can come on that ONE day.
Pick a date, start a "Cow Mountain Range Clean-up Day May XX and XX" and a sign-up roster. Get enough singed up, and it would show BLM WE care and have NO intention of letting that place go to chit and allow it to be shut-down.
Stay hard, Go Navy.