Haze is could be a big problem if there is a bit of sun about as you will find viz layers even if there is no cloud reported at the same altitude, i did a flight from NZOM to NZPP and the CL was BKN 4000 Viz 40km but there was a nice haze layer at around 2200.
That haze layer blocked the viz in front but not directly below me. because i'm a bit of a geek i had the nav aids (Tory VOR and PP NDB) dialed in so i continued above the layer and knew were i was with some degree of accuracy. NOTE i was NOT in IMC as i had visual contact with the ground at all times.
Airspace is 2500 and 5000 depending on where you are in the straits so i elect to fly just under, giving me enough time and the height (for transmission) to get out a mayday call. they could get a chopper to me in 30 mins if the call is recieved (and i may even know the winch man! small place NZ). something to think about when scud running under cloud along the coast.