How would I move NPCs in other streaming levels?

So I wanted to move my NPCs while streaming multiple levels. My thought is that I could create a map variable with Names-Vectors. I would nav data of every level and then move the vectors themselves without actually having a pawn moving. So the question is:

How can I use the “move to” only on a vector?
How can I save Nav Data of level as a snapshot so the Nav data of buildings and roads is preserved?