Private property or not I suggest wearing a LOT of hunter Orange...
Deer are color blind and you will not be any more visible to them in orange as cammo (If the orange is patterned and broken up of course). For your sake please wear it.
Muzzle loader of .50 cal will be perfect, but you gotta know how to load it and shoot it safely.
The Smooth bore is your easiest bet for now, as all you need are rifled slugs and a target plate to test it out on and get used to slug shooting.
Then you need a license, and you need to learn how to field dress the animal, you need to be able to tell a Buck form a Doe... But that's just common sense.
Your next questions should be more specific...