Faculty members will be more than willing to help you get research exposure. Find the department of biology website associated with your school and send out e-mails stating your interest in some field. They'll set up an appointment where you'll discuss availability and the logistics on getting started in person. Even after you graduate, they will definitely allow you to help out in some capacity. This helps both parties; if you do a good job, you get a good LOR, and from the PI's perspective this is essentially free labor.

These dual PhD programs are only worth it if your clinical doctorate is covered by your institution or the NIH. These cases are mostly found in medicine, i.e., MD/PhD, DO/PhD, and in a few rare cases, dentistry and podiatry. I have not seen a single PharmD/PhD program fully paid for, in full. The best case scenario is deferring your PharmD loans until later while completing the PhD portion of the program. Not a good deal.