I didn't do mine myself, and as a spectator, I'm glad I didn't. My mechanic pulled the outer shell off, which oil started flowing out and making a mess. Then he had to cut multiple layers until he could get to the inner bushing. He pulled that off, and it was under so much pressure that it shot like 6' away. So be careful when doing that!
I'd also agree that you might as well do the front bushing while your a-arm is removed from the car.
Also, what size tires are you running? 255's (and less) should be fine, but anything wider might contact the front of the liner when turning, since that rear bushing pivots the wheel forward about 1/2".