Quiver type is a real personal thing.I personally prefer bow quivers but I have also used them for decades and am very used to them.If you decide on a bow quiver,make sure it doesn't affect your shooting or tune.
I prefer as light a quiver as I can get and have used everything from 4-8 arrows.These days I prefer a 5 arrow model.You may want to carry one arrow with a blunt for an occasional stump shot or shots at grouse.In many areas,mountain grouse may be in season the same time as elk and are found in elk country.
With a 5 arrow quiver,you would have 1 blunt and 4 broadheads.You maynot need that many but I'd rather have a couple too many than not enough.
If you decide to use the Duiker quiver,I would load up my pack,take the quiver and bow and go for a walk and see if they all work together.Anyway,good luck on your hunt.