Like Frederik Dawson I visited all three of the areas included in this WHS. I travelled by bus from Phitsanulok railway station to Sukhothai. From here it was easy to reach the Sukhothai Historical Park, 12 kms away by minibus.
From the Sukhothai bus station I found buses heading north which stopped at Si Satchanalai. There were bicycles available for hire on arrival, but I chose to walk the 3 km to the temples.
Similarly there were regular bus services heading southwest to Kamphaeng Phet which stopped at both zones of the WHS.
I thought the ruins at Kamphaeng Phet to be better preserved than those at the other two locations. But both Si Satchanalai and Kamphaeng Phet were havens of solitude compared with the hordes of visitors at the Sukhothai park.