I have spent several hours trying to make an armature "walk" in a complicated pattern. I realized there had to be an easier way to do it, and I thought "what about putting the root bone on a track?" The only problem is, I can't have it on a track the entire time, only for about 300 frames. I recently learned Child Of constraints can be keyframed on and off, so is the same thing possible for tracks?
Or am I remembering my earliest classes wrong and "tracks" are absolutely not what I need.
(For anyone asking for the Blender file, I've tried to send Blender files here on pretty much every question I asked, only to meet with failure. I think my projects are just too large, or something, so you might have to work only from my description unless I can figure something else out.)