I'd go for the boat. You can always pack your tent into the boat. Besides I've found that it works out cheaper to stay in a cabin and bring your own boat than it does to bring a van and hire a boat
well i love the idea of a boat its sooo cool but my mum has always gone on about camper vans and how cool they are. i think theyre both differetn styles of living and its up to you whether you want to cruise on the water or explore the land
good luck
Bubblie xx