I agree with Becca21, I think he'll go, but not stay the whole year. Maybe he'll find out something while there and act on it as soon as he can. As for who goes with him, I doubt Ms. Weasely would let Ron go, so he'll probably leave without her knowing. And Hermonie will also go along. Thats all I see going. But he'll get some help from the usual. Ginny, Fred, George, Neville, maybe Luna, but I dont see her having a big role this year. And i cant believe that JK would let slip the future of Hogwarts, expecially if its as big as it shutting down. I just dont see it happening.