thats pretty much it. definately get new bearings...you want to avoid any unnecessary problems down the road that could have been avoided
as far as the spacer, I wouldn't set one up without them. Its 100x easier for the guy who doesn't set them up for a living. If its not right, pull the pinion nut off and re-adjust it. If the pre-load is wrong with the crush sleeve and its too far crushed, you have to get a new one.