You will be in my neck of the woods. Most of the counties you are traveling to are all in the Culpeper Division of VSP. Shenandoah and Page are on Culpeper Ch. 2, and I am almost positive Warren and Clarke are as well. You will be in Augusta County when you are in Staunton and that is Division 3. If you are looking only for the local VSP Div., Culpeper TG's ( Div 2) and Appomattox (Div 3) are all you will need. You would also almost certainly hear most of the traffic from Fairfax Division when you are in the northern part of the valley and Richmond toward the south, as well- and occasionally other divisions if you are interested in those.
I would load at least the following towers: Fork Mt. (Madison County), Mount Weather (Loudon), Independent Hill (Prince William), Hogback (Rappahanock), Harrisonburg (Rockingham), Rawley Springs (Rockingham), Bear Den (Albemarle- but a major tower), Elliott Knob (Augusta).
If you have any more questions, let us know. Safe travels!