Perhaps someday a southern observer will compile a hit list that will serve to take place of the Messier list. It is imperative that your observing site have good horizons in all directions. If your view is blocked from the horizon to the East, you will not find the early morning objects at the end of the list. During the marathon most observers will need heavy, cold weather observing clothes. The most important item for keeping warm, which is often overlooked by those who do not observe in cold weather, is a hat.
Much body heat is lost through the head, where blood vessels are close to the surface.
Layering is the secret to keeping warm. Wear long underwear under your pants, try using overalls such as are used for skiing or snowmobiling. Plan to set up before the sun goes down. Your observing site should be available before sunset. If you must set up all your equipment, try to arrive one hour before sunset.