I AM NOT SURE IF POSTED BEFORE:
i will post a vid soon but if you would like to find out how to get on the the main camping house's roof message me on xbox live if having trouble will give you a walk through gtag: ITS SHOWTIME 32

what your gonna do: first you will climb on the railing in middle of map you wil walk on that all the way to the pillar on that. you will slowly walk to the side of the pillar.when you feel you have gone the farthest you can go without falling off you turn around and look at the wall behind you. then you will click A if done correctly you will climb onto the pillar. then on the pillar you will jump onto the pillar across from you. then you will follow that pillar all the way to the roof then you will run jump onto roof then you will walk along the side off the roof al the way till reaching the end you will follow up the railing and jump side ways then if done correctly you will be on the very top of the roof!!!