Since I go to a LAC, all the chemistry majors take the same coursework. There are few concentrations. I am not even a biochemistry concentration. There are people who want to go study biochemistry in grad school and are in an organic lab or inorganic chem lab.
Why do I think I like pchem/inorganic? Tell me if I'm shallow, but I enjoy my pchem and inorganic classes a lot. But I decided to "settle with" biochem because I didn't do so well in the former due to personal issues. I also really love physics lab, and understanding how spectroscopic techniques work, but didn't start research as early as I should have. I think the techniques and the machines used the pchem lab are much more interesting.
I plan to take a lot of math, some advanced physics, and group theory and pchem in my senior year. No biology except for an advanced biochemistry.
I will try to plead my case to my prof and see about the summer after graduation to do volunteer research. You are right, I think I will have to try the lab out first.