How much money do you have? How much electrical power available?
If you answered LOTS and LOTS then you can have broadband speed almost anywhere in the world. If you answered LESS THAN MY CAT and AS MUCH AS BAGDAD ON A BOMBING NIGHT then you might be happy with a second hand Toughbook and a Sat phone or SSB/Ham for email.
Anything electronic you bring that isn't marinized should be considered disposable. Freak waves,leaking ports, or forgetting to take off salty foul weather gear will destroy a laptop fast.