As a coding-vacation? Or as something that blends well with remote work?
We've adjusted the format of the current Hacker Retreat to accommodate people working (remotely, on their startup, etc) - 20% of your time is committed to learning, the rest of the time is up to you. The time-span is over 2 months minimum. We're currently taking applications for the Batch-02 starting in May/June.
Super-compressed, 1-2 week retreats are something we've thought about, especially for advanced topics like data science and functional programming...may do it later, but not this summer.