If your stuffing is ready before the rest of your menu is ready to serve, just switch your slow cooker to the Keep Warm setting for up to an hour. Even on the lowest setting, the stuffing will continue to cook so I don't recommend allowing it to go much longer than this or the texture will begin to change. Instead, just unplug the slow cooker and keep it covered until ready to serve. Don't allow any menu items to sit out for more than 2 hours before you pack up and refrigerate any leftovers.