Thank you so much for your advise. That is really very helpfull. First of all thanks a lot for warning me about the winter cold and storm. I didn't have any idea. When I was planning the holiday I checked warmest places in USA to visit in December, and selected Phoenix too. Of course Grand Canyon is far away from Phoenix! Silly me!. Well I'll bring plenty of warm cloths.
Again I thought the train trip to GC would be nice but after your advice it seems to me may be I'll be better off booking a tour bus with overnight stay in GC? I am not a very confident driver in new places and only have experience in left hand driving in Sydney. Bit nervous about right hand driving in USA so I'll stick to the tour buses! I guess.
One more question are there shuttle buses in GC still run during winter times?
Again thank you so much for your time and advise. I may have more questions to ask you later.