Castiel had always had orders, since before humanity was created he'd had a purpose. Before there were eyes and fingers and knees he had a purpose, he had direction, he had orders. They were all he needed, a place and a purpose he could believe in and, in a lot of ways, those were still his most fundamental needs. Food was required, warmth, water, a sponge to clean the dirt from his skin, soap to wash his hair. They were needed but they were not a part of his fundament. They were for his body but not for his soul. Without is cause and his direction there was no peace, even by a quite river on a still night but he walked.
What was even harder was that his new cause, protecting creation by protecting his friends, the Winchesters, was growing more and more complex. They seemed to have moved on. Dean to a woman Cas could accept, Sam to... Cas didn't want to think on that now. All of it meant his place was woolly. He was used to the boys being able to jump when was needed, being free to focus on the work. He was used to having their ear. He wasn't used to stepping around family considerations. He was always going to go home, if he survived and they could move on, but trapped they were all to him and he... was not doing so well.
Cas knew he shouldn't go to Dark for all those reasons and he'd been right. Looking at Much now he figured it was as well neither of them went. "It reminds me of home too," Castiel said, sitting down by his friend, placing the blanket beside him. "Are you hungry?"