The characters in my story need to build a raft that will go on a river and carry six people. They are in the middle of a wood so there's plenty of branches and there's a lot of strong creepers that they can use to tie the branches together. But what sort of branches are best used for making rafts? How long should they be, can you safely tie several shorter branches together that sort of thing. And is there any other information I should know? Like, would creepers work for keeping branches together in a secure raft? And anything that I don't know to ask.
If anyone can help me, I will really appreciate it.