Corridor mission plan

Hey guys,
I want to fly a corridor mission for the first time for a road reconstruction project, but not quit sure how to set the GCP as i have heard that it has caused some problems when georeferencing.
Has anyone any advice how to set them?

-Mavic pro Drone.
-Road is about 1 Km.
-Flight AGL 60 m.
-Front overlap 80%
-Side Overlap 75 %
-Flat Terrain

Thanks in Advance!