I shoot both wood and carbon - I rarely shoot carbon, really like wood, like making them too. I use a bow quiver all the time, every bow, although sometimes I know I am out to have fun and want to shoot at squirrels and stuff so I bring a side or back quiver for extra shots.
I will say shooting carbon gets me shooting better, they are always the same, always weigh the same and the consistency can not be beat. When I shoot wood, each batch comes out a little different in weight, so each batch shoots a little different, I guess.