[mrtiesto]

Its been a few years but I’m pretty sure that it is not easy to get there on public transit, so you may want to hire a wheelchair taxi.  Wheelchair Holidays Thailand has a pretty big one that can take power wheelchairs: https://www.wheelchairtours.com/wheelchair-taxi-rent

From what I remember, even if some areas were not accessible, the grounds are very big and worth seeing. Some of the steps under  archways had slopes.

You might be able to check it out on Google Maps Street View…