I have an assignment for shooting a rowing regatta (race) and looking for some tips from anyone who may have done something like this. I'm typically a portrait photographer so this is a bit different for me, which makes me look forward to it.

Which auto focus would you suggest using?
Thinking an F-stop around 2.8 to 4 would be good?
Likely bump up my ISO a bit to make sure I'm getting a fast shutter speed too.

TIA for any advice.