Sudan - the South in April

Hi!

Last year even when deep diving in the Suakin Archipelago end of May, I did not see many hammerheads. Now, I would like to go in April for hammerheads at shallower depth (30m).
Actually, is the South a good place for hammerheads in April? I was offered a two-week-tour to the South. I imagine, the North might get quite busy during that time of the year.
What wet suit should I bring in April? 3mm or 5mm? With hood?

Thank you.

Cheers,
Liberty

Hi!
Anyone dived the deep South like Dharat Abid etc. and could comment whether it is worth the effort?
Cheers,
Liberty