Since it was impossible to go through everything in Hogsmeade, we had the house-elves bring everything to Hogwarts. Everything is boxed up and labeled by building. They are all stored on the fourth floor near the library.
I think we should make that floor our research area, keeping it off limits for residences and students. I know it's a lot of space, but we will need it when we eventually go to Diagon Alley and Knockturn Alley.
If there aren't any objections, Remus and I can go through everything to search for clues, but also to make a record of personal things that were left behind. Pictures, diaries, etc might become pretty important in the future. They would provide a sense of history that will soon be gone.
I know that I'd work on the books but i think Dumbledore volunteer for that.
Anyone wants to come and help, you are more than welcome, but I understand that looking around the castle for the key is more important.