Well, if you park at Lion's Yard there is are about 1 million bus stops right outside that go to the hospital. I have no idea which is cheaper, but I suppose that you would drive to the hospital and then drive into town, so never mind. It has been a long day at work.
BTW If you do come into the Grafton Centre, you might notice that the horrible, horrible, Merlin anamatronic christmas (I know it makes no sense, Merlin, sheesh) display has been BEHEADED. Totally awesome, punk rock thing to do as the music was driving everyone insane!!