Skeletal Mesh "walk" over another Skeletal Mesh

Skeletal Mesh “walk” over another Skeletal Mesh

I’m making a terror cinematic. I want to make a cockroach walk over the main character. The cockroach has to be a skeletal mesh, because it will be a close view, so it will be possible to see his “legs”. And it will be over than 20 cockroaches.

What is the best/easiest way to do it? I don’t have any clue how to start.

At this point, I’d say make a VFX via Niagara.