I did north to south and enjoyed the first half day to Bodfari. Personally at the end of a LDW I like to stay overnight rather than rush back home. Gives me a chance to unwind and reflect
I just hate long drawn out journeys home, I don't mind it going to the start. When I did the Pembrokeshire Coast path, it was a morning bus to Havefordwest and then train journeys that lasted over 8 hours to get home, the journey to Manchester had about 24 stops and it was a long day.
Getting to/from Chepstow is about 4 and a half hours, getting to/from Prestatyn is about 3 and a half so if I finished there before lunch time I still have a few hours to unwind and reflect before heading home
Like I said, it might depend on accommodation when I go to book as some parts don't seem to have many options.