I’d make sure I tied each end to a monument, property line/corner, and/or SPC. I don’t believe it’s required to actually monument the easement. Just make sure it can easily be reproduced.
If it's just a strip along one of the boundary lines, I wouldn't monument, unless your state requires it.
If it's a curvy or complicated configuration, you might want to set a few at some of the angle points and ends.
Often with these types of easement it's a good idea to file an Exhibit "B" drawing attached to Exhibit "A" and for a road access there is nothing to stop you from overlaying it over the most recent ortho.
An access road forty (40) feet wide twenty (20) feet each side of the centerline of an existing gravel road centerline, as shown on Exhibit "B", attached hereto and by this reference made a part hereof; said centerline being more...……..
Add a time constraint either in the preamble or on the drawing. Be sure your ortho is correctly placed.
Calling to the center of the drive creates confusion down the road and leads to ambiguity when the road is no longer in the same location. There is nothing more stressful as a surveyor when you cannot recreate the intention of the document.
The best course of action IMHO is to use the center of the drive as a baseline with an easement width that accommodates the entire drive. Tie it down to the boundary. Let the bearings and distances the with calls to division lines where applicable be the calls. The language of the easement may require the drive to be replaced in its original location for the easement to remain valid anyway. That will be a thing for the lawyers to work out.
Unless of course your state board or client requests control to be set.
Also, are there any utilities running through your property to the other PQ in question? That is very important to address as well.