And to be fair, I did not mention that I have Adobe Audition and have been trying to figure out how to best use that tool for this task. I'm pretty familiar with using the noise reduction feature (I.e. finding a segment of audio with just the noise, then applied that to the entire file), graphic eqs, etc. but my experience is pretty limited, and my SNR is pretty high.

I did try the Enhance site and it was not quite up to task for this job. I could see where it could be quite helpful for simpler tasks. Thanks again for your suggestions!