I definitely agree with the well rounded aspect. I'm doing my volunteer work like that so I'll be able to have all different experiences. 6 months in the ER, 6 months in Oncology, 6 months in the ICU. I was sort of under the impression that volunteer work for psych would pretty much consist of menial clerical work and I wouldn't get much exposure (which is why I was looking into shadowing).
At any rate, I've wasted enough of this forum's space with undergrad questions. Thanks for the help!