When I walk that stretch I usually park the Dogs Hill Road end. Over Christmas I made the mistake of dropping in down Harbour Road end when on my way back home from walking the other side of the River. Big mistake! Took me nearly half hour in and out and at least three circuits of the car park...
Tourist advice. That big free car park will be absolutely rammed during school holidays. It could even take nearly half hour to drive down through the carnage that is Harbour Road to get to it 🙄
As for Winchelsea. If you're strolling around there then have a look to see if any of the cellar doors are open on some of the houses to have a look around. I think they may only open on certain days though. I haven't yet wandered down them myself.
Also, if you park the car in Monk's Walk...
If you fancy a spot of birdwatching, you might want to pop along to Pett Pools while you're at it. You'll be in with a very good chance of seeing Marsh Harriers for starters, which always makes my day.
https://www.highweald.org/explore-sussex/nature-reserves/1009-pett-pools.html
Also, high...