I have a whole lot of time in both the 'van and the PC12, and I basically never felt scared by the whole thing. Granted, only a fool would head out of gliding distance of shore on one fan, but that's hardly necessary now is it?
The last I checked, the only reason a caravan engine had EVER failed in flight was due to lack of fuel (pilot induced) or oil (generally from leaving the dipstick in the bottom of the cowl). The only concern I ever had there was ice, because the 'van sucks in icing. That is of course an entirely different set of rules.
As for the PC12, I was seldom out of gliding distance of a field even in northern Canada where fields are few and far between. Departing Thunder Bay for Sault Ste. Marie, (right down the middle of Lake Superior--a huge puddle of fresh water) there is only a 10 mile stretch where one is not able to make an airfield. There is never a time where dry feet is not an option. I would (and have) take a PC12 down V300 any day, but wouldn't try it in any twin smaller than a B100. At FL250 you can glide 65 miles in still air, and with the GPS and moving map features there is never a question about where one might land. As training pilot, I would make 200hr co-joes do zero thrust (simulated dead stick) approaches (ILS in IMC) from at least FL200 as part of the mandatory line indoctrination (I wrote the rules for our company). They all made it. The captains had to do one to landing into a 3500' dirt strip on GPS alone under the hood. It was easy with the equipment on board that bird. Off strip would be little worse since the structures on those things are built like a tank for one, and the stall speed is so low that landing anywhere except directly into a rock face is almost certainly survivable.
I'll take the PC12 any day over some of the broken down old piston twins and B99's that are flying around here anyday!
But that's just my opinion....
