I just happened to replace my rear rotors and pads yesterday.
Even though the parking brake was off, I still rotated the adjustment wheel all the way to retracted position in order to minimize the chances of the rotor hanging up on the brake shoes.
Once the caliper bracket was removed, i had to use a heavy hammer to break the bond between the rotor and hub. My car isn't rusty, as I live in Colorado, so I was very surprised by the amount of beating I had to give those rotors to break them free from the hub. Just a little bit of surface rust on those two mating surfaces really glued them in place.