The rear is really only a little more complicated. You do have to take the cassette (or freewheel) off, so you'll need the right tools to do that (chain whip & lock nut tool if you have a freehub; appropriate freewheel tool and a wrench if you have freewheel). But once you do that, you just work from the non drive side, take lock nut and cone out and slide the axle, with drive side cone and lock nut in place, out the other side. Often you'll have larger and fewer bearings in the rear so I find they tend to be easier to keep track of.