Abi had found out from Zeke that the little house in the snow was already ready for them. When Abi asked Zeke to send people to prepare everything because it had been three months since they were last there, the caretaker Zeke called had said that Alex had ordered them to attend to the house, even in their absence.
Knowing that made Abi happy because it was like Alex had been maintaining the place because he had planned for them to go back there again.
However, she didn't intend on going straight to their little house in the snow. She wanted to replicate their journey as much as she could to give him as many triggers as possible. So she directed him towards the first place they stopped at.