if you have a solid understanding of classical statistical mechanics (i.e. Boltzmann statistics) you can pick up the feel of boseeinstein / fermidirac statistics fairly quickly, even if you are not too familiar with QM.
Boltzmann derived his classical statistics from thermodynamics, but trying to understand Plank's work without QM is impossible. You can apply thermodynamics to the problem, all you'll get is the ultraviolet catastrophe
