Hi Wendy and Stu!
The last time I visited Arillas my wife and I stayed at the Bardis Sun Hotel and it was booked through Thomson 'small and friendly'. It disappeared from the brochures and I tried to find where it had gone. I seems that a Scandinavian firm were booking it until this year when Thomson started to use it again. If you go to the thomson website under Greece/Arillas/hotel name it does come up, showing that the hotel is open until 15th October with no vacancies for this year. I admit it's most odd as the Thomson Holiday Shop don't have it specifically listed on their computer, but they can find it when they do a 'complicated' search. The hotel was good, but we spent a lot of time with Poppy and her family at the Studios next door. As I recall the Hotel is run by the Bardis family, Spiros and his two brothers and the young lady running the breakfast/catering, Dorita was also a relative of the Bardis family. I think the family also ran one of the Tavernas (possibly the Grazziella) on the front.
As you say, Dimitri will probably be able to fill in the gaps.
All the best,
Martin.