In my experience, carrying normal photo gear (I don't know about anything exotic since I don't have any) is no problem. Sometimes they will want to open your gear bag and look at what's in it, but only briefly, with a minimum of fuss. When I went digital, I was originally concerned about the mess of cables, battery chargers, etc. that came with it, but they didn't turn out to be a problem.
Of course, if you give them other reasons to be suspicious of you or be annoyed with you, they may make a big deal about everything, photo gear included, so avoid looking for trouble.