in terms of rafts there are several cheap options available from the warehouse i got one for about $25...

otherwise if you are feeling adventurous then perhaps it would be possible to construct one out of truck inner tubes most tyre shops should have these available. we should have access to ropes and long sticks for the frame construction

---

I don't think I'm alone when I say I'd like to see more and more planets fall under the ruthless domination of our solar system.