Well, no clue how to do timelapse stuff. The save is not mine, one I found somewhere on the interwebs. Add your mod and fire it up (takes a bit of time due to the size), it does not take long. In fact, once in-game, just start moving to the west, by the time you arrive, so will they.
https://drive.google.com/file/d/1qfXc-uQQBL_l87_Gi80Oh_scGqQ9NWKL/view?usp=sharing