You should be able to just pull the sprocket carrier/cush drive out of the wheel, when the wheel is off the bike, its just the rubbers holding it in there. To get the bearing retainers out when/if you do wheel bearings, you have to drill out the places where it was staked, if it hasnt been done. You can tell by looking at the perimeter of the retainer, if it has 4 little dimples, they've got to be drilled, if there are four little holes, then its been done. Then, if you dont have a spanner, you can take two large drifts or punches, and hold them together with one hand, slide a large screwdriver between them, and use that to unscrew the retainer. Be careful to hold the drifts in the holes tightly, so that they dont pop out and muck up the retainer....

But, its not necessary to remove the bearing retainers to pop the sprocket carrier/cush drive out. Hope this helps! Oh, and where in Washington are you located?