I don't know if you really want to be carrying a bag around the whole time. They'll let people put their luggage and stuff in some office when you first get there. Also, they give you coupons for lunch (and its plenty) so I don't think you need to carry your wallet around. As I recall, the tour was quite extensive, and you have to go like down the block and across the street for lunch, so I don't know if you really want to be carrying a bag around when no one else is. But, yeah, bring a folder or whatever to take notes and put the papers they give you in. The biggest problem I had with my temple interview was that the name tags they made us wear were not very sticky and they kept falling off every five seconds. I don't know if they're using the same ones, but my guess is they were old last year and they're still old this year. So if you can think of a way to circumvent that problem you'll be in good shape.