Hmm good question - I haven't used particles too extensively, and definitely not with head turning yet! Yes, For a system like this, where a bubble could rise but then have its parent group removed when a view changes, it may make the most sense to do the system outside of head turning so you don't run into weird conflicts. A separate bubble puppet might be the way to go - or if you add it into a group above the head and have them coming from the general mouth area (although this might not line up exactly how you want it with each view) - but if you're doing it manually with the mouse click anyway, you probably want a certain level of control.
I will try that next and tell you how I get one.
p.s. Love your videos they have been extremely helpful
If the unwanted particle that you're still seeing is the original emitter layer, try changing the Particle parameter called "Emitter Opacity" from 100% down to 0%.