Final answer:
Without the specific context pertaining to Dicey's actions in a known story, it's not possible to provide a definitive answer to the reason she took the children to Rockland State Park.
Step-by-step explanation:
The question "Why did Dicey take the children to Rockland State Park?" pertains to the story's plot. Given the options provided and without a specific context linking to Dicey's actual actions in a known story or text, it seems your question might be from the novel 'Homecoming' by Cynthia Voigt. In the absence of explicit textual evidence from the passages you referenced, which don't mention Dicey directly, we would be guessing if we chose an answer.
In the novel mentioned, Dicey brings her siblings to different locations for various reasons tied to their journey, often seeking safety, shelter, and as a way to stay together after being abandoned. It's possible one of these reasons motivated her to visit Rockland State Park.