Definitely you will like Loiter for that type of work. It was taylor made for it. It will basically fly the helicopter, short of whatever angles and altitude you want to make it do, which you can do with the sticks. So you can concentrate on running your payload.
So you can make a pass over a site, for instance, where you want to get an aerial view. Set up your payload for the right angle and whatnot. Now put a little cyclic into the heli and start it moving over the site and make your shot, and it's really smooth and fluid. Even letting go of the cyclic and letting the heli come to a stop is really smooth. That's with the default settings. Like Bill said, you can turn 'em up to make it more "snappy" but then it kind of ruins what the mode is for, because even with a gimbal you'll see the jerky movements especially in video.
Super smooth is the name of the game in aerial videography and cinematography.