Silent Upgrade from Rhino 5 to Rhino 8, plus Grasshopper RHI file plugin

Looking to silently upgrade our existing Rhino 5 classrooms (about 120 PCs) to Rhino 8. Is it easier to just do a parallel installation, and leave 5 in-place?
We have a grasshopper_0.9.76.0.rhi plugin that we install with v5, can this same file be used in 8? Can this be silently installed as well?

Grasshopper is built into versions of Rhino after 5, you shouldn’t need to reinstall the grasshopper plugin at all.

Thanks Jsb!