But the text says nothing about this. Tradition gives us the names of these kings. Balthsar, with dark skin, was King of Arabia. Melchoir, elderly with gray hair, was King of Persia. Of course, the text says nothing like this.
Tradition also says they came riding in on camels.
The Bible tells us nothing about their means of transportation. I think this tradition of three wise men grew because three gifts were given. But, once again, the Bible does not tell us how many there were. Apparently there were two kinds of magi in those days. Some of them were magicians, charlatans, soothsayers.