I hope they do well.

Even if they can't manage to go the full 30 days, it may not be a failure, but instead a success.

Judging by the blog it seems most likely that they will fail, at the very least in some of their lofty goals, but it still may provide some valuable insight for these three and possibly others.

If they go to the right place, people know where they are, and there is some kind of contact it may be no more hazardous than your average camping trip with the exception that should they get hungry enough they may decide to hike to the car and go home.