Jen, at over two years past treatment, we finally realized that our regular dentist wasn't very knowledgable about post-radiation dentistry. We talked to our ENT and he suggested a periodontist/dentist that is very good with radiation issues. We were a little surprised that it wasn't suggested to us at the start - but better late than never.
Anyway, you are probably correct that your CCC is your best resource for locating the right person. You might keep the idea of a peridontist in mind - as they are good at the soft tissue problems that radiation can cause.
Best,
Anita