I took my time doing this over Easter 2006. 19 days (but you can do it in 12 comfortably) of near solitude, camping the whole way and eating every night in a pub. One Sunday I arrived at the pub in time to see the local football team get whipped by the neighbouring team.
Neither Chepstow nor Prestatyn are inspiring but everything else in between is wonderful. Except for the sheep. God damn sheep. Hate em.