Is the traditional name 'Arthur'? My first impression is that it's a very English name to combine with very American-sounding names like Hunter or Forest.
Would Wolf be pronounced like the animal, or 'Vulf', short for Wolfgang?
They're all very outdoorsy, macho, pioneer-type names, which I do feel is potentially problematic in constructing a certain idea of a child - supposing little Wolf is a timid type, or Winter feels the cold even indoors, and Forest loathes the fresh air, and us never happier than hunched over his Playstation? If Hunter is a committed vegan and hunt sab?
Arthur (that spelling) splendid as a first name; all the rest excellent as middle names, but, as others have said, a potential burden/embarassment to a child or adult.
Why not have (say) Arthur as first name and then one or two of your list as middle name(s)? You can call him by one of those, but he would also have the option of using a less 'labelling' first name if he preferred.
I've seen Hunter used as a first name up here (Scotland) as surnames used as first names are quite often (though Campbell, Cameron, Innes, Murray, Findlay etc more common.) I don't mind it, but I am not keen on the rest. Agree it should be paired with a more conventional name to give your DS the option of using that if he chooses to later on in life.