+1 on the above. South to North is the wrong direction! You will be fighting the wind the whole way. To give you and idea of how strong the wind can be, I can't remember the exact section but I can remember looking down at the bike computer and i was doing 27 miles an hour on a flat surface without even trying.

I meet a couple of guys going North. We were stopped a construction stop. I yelled across "you are going the wrong way"! They both slumped over their handlebars and the one responded "we know". They looked beat and they had some of the worst hills ahead of them.