Basically you are creating a dominant tenant.
It some cases a survey is needed, but it depends on what your property has already.
I highly doubt your neighbor will be interested in anything for 5 years... they are looking for permanance before building their road.
I would look at this on a case by case basis. If its a neighbor that needs access and my parcel is large and wouldnt affected much, I have in some cases just given it to them. If its a smaller property I would look at the percentage/value for the amount of land use I would lose and charge them market value.
What I mean is, if you have a half acre lot and the easement roadway will take up 1/6 of you lot then a starting point is the loss in value.
I would make the buyer would pay for the legal fees on this... on top of the consideration for the easement.