Charcoal bamboo for night time.

I went with prefolds and covers and some pocket diapers that came with microfiber inserts..now I've been doing more cloth video watching and realized alot of mom's say over night leaks are a big problem. ..well before I run into baby peeing through the diaper with prefolds I thought i would use prefold and microfiber insert to bulk up for night but I'm seeing that might not be enough...so with more research I've found hemp and bamboo to be good for a heavy wetter or over night ....I'm thinking of purchasing 12 charcoal bamboo inserts and can double up with those if needed. Anybody think hemp is better I know bamboo absorbs slower but holds alot so I thought in a pocket diaper I would use the microfiber and bamboo under so when the microfiber is full it leaks onto bamboo slowly lasting the night....of course I could be 100% wrong. Thanks for your thoughts.