def good to be prepared,
the rafting places have diff scenarios, guide on raft, verus raft completely run by customers and guide is in a kayak closeby etc. what they try to do is break up teams so each raft has a mix of newbie experienced person etc. they go over safety in qute detail before you set foot in a raft.
as i said, i took ppl rafting who had never swam at all.
It sounds like fun..........
Yes you can. I am not a good swimmer and some of my friends can't swim at all but we've been a few times. As X2 said you can always wear a vest if you are scarred.
Not scared of the Water............it is the rocks that can knock you out...:)