You won't be able to pull them out without ruining the feathers. Can use a tin-snips or other cutter to cut them off at the base, or as Mike suggests, cut along the quills into the wing to loosen them so you can pull them out.
Most folks only use the primaries (outermost 8-9 feathers) for fletching. Some use the secondaries as well, particularly for flu-flu arrows.
To keep the wings from decomposing, throw them in a plastic bag and put them in the freezer. That's a good thing to do with the feathers after you have them off as well. A day in the freezer will kill any feather mites that might be present. After that, can store them in plastic bags anywhere.