If you are "really" recruited and don't 3Q, West Point will send you to a Prep School.
I am assuming you are a junior. If you are a senior, unless you already open your application file, West Point will send you to a Prep school.
Usually for seniors, September/October you should get a LOA. I don't know how other college recuritng works, but for West Point that will be the first official document. I have seen SA coaches write letters of recommendation for the nomination.
My recommendation is to still work on your back up plans, as many things could go wrong.