Is this a good plan for sneaking out?

I'm trying to sneak out tonight. I can't go out any doors or downstairs windows because we have an alarm. Do you think it would work if my 2 friends came and put a ladder up right underneath my window? We have a fairly big house and my parents room is on the opposite side of the house from my bedroom. The ladder is laying on the ground in my backyard, so it's pretty close to my window. Do you think I could get away with this? Or would it be way to loud?