OK, assuming you can get a carbon fork with the right geometry and clearances, now the question is what's it's advantage, right? A carbon fork will be somewhat lighter but that's it's major difference compared to steel. The downside is, of course, cost.
You will hear that carbon reduces ride harshness and is more comfortable. That's a bit misleading. I've ridden numerous carbon and steel road forks and see very little comfort difference. For a road bike the weight difference is huge and that's the real improvement. If you want a comfortable ride, use larger tires at lower pressure.
Steel will be more forgiving of abuse and for a tourer, particularly one used for even mild off-road riding, that is an advantage.