Tropicallvr

Many other plant genus' require some sort of resting, or cooling period, but Musa are sort of a mystery. Pretty unpredictable. Even thin shelled ones can last for years. It also seems like some companies have better storage procedures than other. The ones I got direct from India were'nt stored well at all, and in the states Georgia vines seems to have a nice cool spot for storage since all her seeds look fresh and really germinate well.
Your question about "is it difficult". If you're refering to M.balbisiana, no they seem really easy even after many years IMO.