The primary source for reports of this stay has been Plutarch's Life of Antonius, 36.
It is surprising, or maybe not, that all we have is Plutarch's account as a record of this important sojourn in Antioch for nearly half a year by two of history's most important figures .
It begs several questions and generates some assumptions. As the flamboyant queen of Egypt with a very substantial entourage it must be assumed that she went in style to Antioch. Cleopatra was not one to "travel light". Consequently, from the vast spacious royal compound in Alexandria, one cannot imagine her moving into anything less than the former Seleucid royal palace in Antioch for such an extended stay (and in winter moreover, which have mitigated against an encampment).
Knowing the Antiochians' love of pleasure and spectacle there must also have been much in the way of panoply and theatre (both on and off the stage).
Finally we might also wonder whether the stay was a "family event" with the two new children of the couple (who would have been 4 years old) in attendance, and maybe even Caesarion (the child of Cleopatra by Julius Caesar).
Mock, Casey, "Plutarch: Life of Antonius" (2005). Senior Thesis Projects, 2003-2006. http://trace.tennessee.edu/utk_interstp3/49