She didn't actually have any kind of plan. First, she was going to find The McCalls and break them out of the whichever farm they had been dragged to. After she set them free she planned to continue deeper into Everett where she would hunt, stalk and kill her father. Then she didn't really care what happened to her.
Stefan and Elena had already told her that her plan was insane. Of course, they had also offered to help her with it but she had ultimately left without them. Maybe Damon was some big red flag that she did need help but she was choosing to ignore it for now. Stefan and Elena were nice and they were happy. She didn't need to get them killed.
"Stefan and Elena don't need those kinds of problems," she said to him. If he wanted to help her she wouldn't object but she didn't want to bother Stefan and Elena. They were basically keeping everyone at camp safe too. Which was a big responsibility.
"And I don't care what happens to Rebekah and Klaus." It was a lie. She hated Rebekah nearly as much as she hated her father. But she wasn't driven to kill Rebekah like she was to kill Alec. She was sure she was walking right into a trap too. Her father had to know where The McCalls were and was just lying in wait for her. She didn't know why.