Ask HN: I want to take a vacation and code; where should I go?

I'm a hobbyist programmer who only gets to code mornings, evenings and weekends. I need a break from work - and the Pacific Northwest - so want to get out of town and spend it working on my current project. I'm targeting late Feb/March 2014. These are my requirements:

- Within the western hemisphere, between Hawaii and the Caribbean, inclusive. Probably no further south than Central America (I'll be traveling from the Pacific Northwest)

- Sun, temp in the range of 75-85 F (23-30 C) and near natural water (not just a pool)

- No family resorts

- Some low impact activities for when I want a break from coding

- Fairly low-key vibe; I don't want my attention competing w/ drunk college kids

- WiFi outdoors (I recognize this is a nice-to-have)

The few people people I've put this question to (non-programmers) have responded w/ raised eyebrows, wondering why I'd want to take a vacation to code. I can't be the first person who wants to do this.

Anyone have any recommendations?

Thanks in advance.