Shrike, I saw that you said you were in private practice and also were able to publish. How are you able to obtain the funding? Do you find it any more difficult conducting research in a private practice setting?
In my administrative contract with the hospital, I negotiated a pilot project fund for start-up dollars. It would help pay for a medical student or assistant to help with some retrospective studies. Funding was not the biggest hurdle, however. (Funding is important, but I am primarily clinical, and my clinical practice/inpatient practice serve as settings for most of my publications.)
For what it is worth, my experience suggests that an important key to productivity is the synergy that can be realized by identifying compatibly-minded collaborators within the clinical setting where I work (preferably ones who can write and know their areas of interest/literature well. For me, this usually involves the neuropsychologists, but for colleagues in the pain "arena", this could involve a pain psychologist, a Ph.D therapist, or even a physician in a different field, such as an anesthesiologist.)
As for the difficulty of conducting research in a private practice setting vs. an "academic" setting, I think most academic settings should have resources that would allow a motivated individual to conduct research more easily than in pvt practice. That being said, if your chair works you to death seeing patients, provides no administrative support, and you have 2 young children at home, I wouldn't expect to publish much. Further, my situation is a bit unique, as our rehab hospital has its own IRB, and has a small research dept. Most do not. We have a gait lab, most rehab hospitals do not. Hence, I have resources most colleagues in private practice settings do not have. If you are in an "academic" setting, you may have an IRB that is comprised of what I call "thought police"; individuals who make it very difficult to get research done because they erect obstacles to investigation even before it starts. Big turn off. I have a reasonable IRB. It isn't a rubber-stamp entity, but if they have questions/concerns regarding something I propose to do, they are reasonable in the subsequent negotiations, and they don't make me wait forever for an answer.
Bottom line: Research can be done in pvt practice rehab settings & hospitals, but it helps to have collaborators and some help from the administration. Conversely, while academic settings should have an advantage with regard to research opportunity, this is not necessarily the case.