Stockpiling Diapers

I’m an expecting FTM that lives on a rural island in the Bahamas. I’m traveling to the US soon and want to stockpile diapers since they are overly expensive here. What I’m asking is how many diapers should i get and in what sizes for my baby’s first 6 months?

-Keeping in mind I won’t be able to return what is not used and the high price of diapers here.

TIA