This sounds weird, but I've had very good luck with Off!'s Skintastic bug repellent in a pump bottle working to eliminate itchies. Discovered it quite by accident. And I get all sorts of compliments on my perfume when I've used it (the unscented, no less. WOnder about pheremones there...)

I envy you getting to explore PR. There was an off chance I'd be there in January, but that looks to be off the table now.