A lot of good points mentioned.
Water is your most import thing. If you cant carry it have provision to purify it if you have access to it. Fire stick and or matches. Mossie net.If you do come down above all stay with the aircraft. If you are picked up use the matches on the before you depart.
As for charts, my time down there was over 30 years ago and pre GPS. I found the normal aviation maps contained too much detail. Instead I used a Michelin map, strip cut and put in a folder with plastic sheathes. I used to have a line drawn, from departure to destination, magnetic track and marked off in 10 nm steps for every route we flew which was all over the country. That was all I needed for 6 years I did VFR charter down there.
Dollars? Yes correct but make sure you have plenty of small denomination also. As sure as the sun will rise tomorrow you get a $20 invoice, you hand over a 100 and they conveniently wont have any change.