I suggest bringing fewer changes of clothes and several swim suits. You will live in shorts and tank tops. I think regular T-shirts are too hot here. But why not just pack two and buy a few while you ae here. You can rinse out your clothes and they will dry overnight.
Instead of a blanet I suggest a couple of light weight twin sized sheets.
I find it so warm here that I sleep on top of the sheet but you may get stuck in an air conditioned room then you might want a sheet over you.
What about a wash cloth?
Using credit cards gets expensive - why not travelers checks?