Reach for recording GCPs

hi there,
I would like to as, how difficult would be to use Reach for recording Ground Control Points for drone photogrammetry considering I don`t have background in survey. I fly DJI so I cant use onboard rover, but being able to record GCPs with accuracy 2-5 cm would be great help for my work. Is it as simple as buying Reach RTK kit, setting all up (possibly with 3DR radio) and recording coordinates in a field? Or is some postporcess required too?

Any input would be much appreciated!

cheers,
Matej

Yes, you can get such accuracy in a field with Reach RTK KIT.

For better understanding of the process you can read Reach docs.
Focus on this first part and second one.

You could also read about GPS post-processing by this link.