I actually wore loose shorts or very very oversized sweatpants for the week in the recovery residence (when I wasn't in just a bathrobe lounging around my room). For the trip home, I had a special huge black skirt that I didn't mind ruining with blood or whatever (although it was fine in the end, and I still have it). It was a little hard to bend over to pull up pants/shorts, but I could manage it.
One thing to keep in mind is that it's not just about not putting pressure on the area - I was shocked at how HUGE the bandages and absorbent pads were. It was seriously like gaining at least 2 pants sizes just to fit all that stuff for the first couple of days, and at least a size up to fit the giant pads even after the packing etc. came out.