On a small sailboat outfitted with batteries and solar panels. Ideally I'd dock only once every few days to take meetings/sync my data/connect to the internet, and then head back to open waters.
This is my fantasy as well. We are so close to reliable cheap satellite internet, the only thing you'd need to come to shore for is groceries/ water/ fuel.
You can get a watermaker and if it's a sailboat you won't need that much fuel. Food is still an issue though.