CK - two things;
When I saw the video of the swim there was a part (taken from a boat, I think, near the first buoy) where it looks horrific, with dark grey water, huge swell, and the swimmers being pitched around all over the place. If I'd seen that before entering, there's no way I'd have gone ahead. But it really isn't nearly as bad as the footage makes it look. I'm a pretty nervous swimmer in the sea, and I promise it was genuinely almost fun!
Secondly, if you're looking for a hotel, try the Atlantic (phone them as the online booking is blocked). It's above South Beach (where the swim won't be) and v near the finish/transition. We stayed there this year, and they were great (though it sounds like all the hoteliers etc made a huge effort).