I'm going to Washington D.C. in a few weeks with the family and will have an opportunity to go "behind the scenes" in some government buildings thanks for a distant family friend who has been working in one of them for decades. Naturally I'd like to get some good pictures instead of snapshots (particularly if the kids get to meet anyone they've heard of), but I'm curious to know how much equipment is too much equipment, in terms of drawing attention from security officials. Looking like a tourist will be fine (and inevitable, I'm sure), but I'm assuming tripods and medium format cases might be asking a bit much. But am I limited to 35mm because it looks like a normal camera? Remember, I'm not going as a photographer, but as a family friend getting to look around a relative's place of work. Anybody been through any security checkpoints lately? How much attention does MF equipment draw these days? In your opinions, what's the biggest camera that can pass as no-big-deal? I've got a 35mm, a Bronica 6x6 and a Fuji 6x9 to pick from. Thanks for any thoughts and opinions.