Prebooked all hotels available in Nafpaktos
if you take a look at the home page, there is a ticker for accommodation.
Mail to firstname.lastname@example.org
to book a room.
Camping space is available but limited, no organized cmaping in the area (one but far).
Rooms starting from 40 euros per double with breakfast.
Could be easier for you to use orga mail instead of a forum to find out a solution.