What an experience. A wonderful atmosphere and we were surrounded with people who wanted nothing from you.
The ambience was wonderful and the number of different things that you could buy was enormous. We visited Walking Street on the weekend so we were able to peruse a multitude of different things.
On a Saturday the market is on Wualai Road (the street that shoots off at an angle just outside the Chiang Mai gate on the south side of the old city) officially starts at 17:00, although the road will be closed to cars from about 14:00 onwards; it's pretty much over by 23:00.
On a Sunday the market starts around 14:00 and lasts until 22:00, with local craftpersons operating stalls along Rajdumnern Road on the inner-east side of the moat near Tapae Gate.
We found a local artist who painted some beautiful pictures which our daughter (and I) thought were wonderful - we will be returning with empty luggage bags next time.