I have read that you must reserve a spot in each shelter you want to use and can't tent anywhere but at the shelters. I have also read that thru hikers do not have to reserve if they can prove that they are indeed a true thru hiker. And I hear other things too, can I get a straightforward answer on what the official rules are? And I see on the home page of whiteblaze that some of the shelters are closed due to bears...will they still be closed during my early march thru hike????