Well as far as resale goes, the same questions you have will be a topic future buyers will also have. I don't know the layout of the land but you might look at what it would mean if you had to use your full driveway for a party, oversized vehicle etc. As Robert Frost wrote, "Good fences make good neighbors". You'll need to have your attorney review the right of way and explain to you exactly what you would be agreeing to legally, what your rights and responsibilites would be. Everything could go smoothly, until they don't. Property line/rights of way/easments are a common source of discourse between neighbors. If this is the property for you, consult with your buyers agent and attorney, it would be worth the extra expense of title insurance with an instrument survey addition to know absolutely where everything lies. You'll have to get title insurance for the lender if you're using a mortgage but a personal policy is a one time expense and can save you thousands in the case of a legal dispute between the properties. Don't rely solely upon what the town has recorded as a "plot plan". Often times there's a disclaimer on these that they are not a substitute for a proper plot survey. Chances are one was done in the past for the right of way but there's no guarantee that there was one or the records are still available. Things do sometimes go missing. Having a proper legal and accurate description and what it means to you is important and one that will be important when resale is considered.
Let us know how you make out,