I am not the caravan expert..but.....
I have 0 time in the Cessna 208. I'm in the middle of a trip now. But I did a quick search on the Caravan+icing and got numerous "hits".
The C208 is a great work horse. There is some concern about its history in ice. In the mean time go ahead and search Cessna Caravan+icing and see what you come up with.
I am not here to bash the Caravan or Cessna.
Any regular C208 drivers care to comment??????????