What I have found when flying gear to a new place, pack basics and plan to hit a fly/tackle shop your first day near a fishing spot. Usually not much beats what the local shops are willing to assist with, besides hiring a guide.
I will research the crap out of areas, show up there and half of what I researched is useless due to conditions or whatever. I get excited leading up and pack items that I don’t touch. I will “kick yourself” not bringing X, Y or Z, but will make do and might end up buying a few things that I have at home already. One thing that I end up doing too often is waste a day or two using the lures I packed, because it sounded right from the internet, but for some reason are not producing now, but a few weeks prior were crushing things.
I can say all of this, but will end up doing the same thing a few weeks when I fly to Mexico…. But I am not going to a tackle shop there. Won’t be leaving the resort.