I have dione it both ways, and depending on the price grab the IRS arms out of the car. (I have got it down to 35 mins to get the arms out of the car and the hubs separated - a bit of practice )
Cheers
Michael B
Removing the arms is much easier (as mentioned).
Only another 4 bolts per side (2 ea for the trailing arm, 1 for the shock, and 1 for the handbrake cable)