really good pics, i bet you had a wicked vacation!
my only tip/advice: after going to Cuba, taking 100's of pics, i went and bought myself a polarizing filter for my D70, and its been the best investement ive made to date [as far as photography]. this normally takes some ppl a trip to somewhere exotic with clear waters and dozens of pics with super-high glare to realise, but its just a tip.
im not sure what kind of shops are going to be accessible to you, but i strongly recommend not paying over 40$. they might sell for 80$ at Henry's, but i got one in the states for 18$ reg. price, and it works the magic! look around, ebay will have em sub-30$.