I have a picture of myself, wife and son in exactly the same place.
I went to Kap Choeng to get and extension to my tourist visa a few years back - I think they're just happy to have people visit as it seems very quiet - it was very useful for me as we were living not far from Prasat at the time.
I'll try and find that photo, although I don't have a scanner so I don't know what I'll do with it when I find it.