You really just follow the signs but coming in through the main entrance with the office on the right go past it an make a right at the stop sign, keep going until the fork.  You go left, drive 100m maybe an make another left an park down on right. Look up towards road to a well maintained trail.

If coming in back way towards shelter 1 you'll go by shelter 1 an see it on your left an then continue to drive until you see the fork to your left, go straight and do the same. But the signs can be pretty helpful.