Final answer:
The detailed answer does not specify when Aven's parents had been in Arizona before but suggests a connection to historical events like the Japanese Internment during World War II.
Step-by-step explanation:
It is not explicitly stated in the references provided when Aven's parents had been in Arizona before. However, considering the context provided about internment camps and historical narratives, it is possible that this question is related to a historical event, such as the Japanese Internment during World War II. Given the mention of Ruth Voorhies as a Japanese Internment survivor and the Poston Arizona Japanese Internment camp, it seems that Aven's parents could have been in Arizona during that time if they were connected to this historical period.