Nathaniel, I think you're right on the money.
I tried a new technique on a recent set of synth images, and while I think it helped things, it looks like it helped a little too much. On an earlier photo session at Kiholo Bay, I ran into problems because I didn't have enough variation in camera location when photographing the scene. So I wound up with three planes of features in the point cloud. Very weird. I took everyone's advice and did the next session from a number of vantage points. This did a good job of fixing things. The point cloud was very clean.
If a little is good, more is better, right? Here's what I did: I pointed my camera 90 degrees to the kite line, tilted it down at about 45 degrees, and with the camera set for continuous shutter mode, I held down the shutter button while letting out kite line at a nice steady pace. That made for long runs of images with the camera basically moving sideways.