Trace,the use of wood or wire stretchers and which is best,has been ongoing for decades.At this time the fur industry prefers that most furs be put up on wood.The main exception would be muskrat,in this case both wire and wood is still used.
Just because wood is preferred,doesn't mean you can't use wire.Some fur handlers,use wire because drying time is faster.Also the storage of some wire stretchers is easier ,because they can be hung up out of the way.
You will have to decide for yourself,which works best for you.Like most things in the trapping industry,there is not a wrong or right answer.Also ,every trapper has their own ideas as to what is right for them.
Tom