My opinion: My work/volunteerism has all been in pediatrics, and I am currently on my first shadowing expedition, which is for a pediatric SLP in a private clinic.
I hope to obtain 200hrs/12 months worth of shadowing to show my peds dedication.
Meanwhile, I would also like to shadow 30-50hrs in other settings to gain experience. So far I have come up with adult rehab, SNF, and potentially hospital.
Thus: I am aiming to show depth in one setting, but would like to pick up some breadth along the way.