Hi Karen,
I know it's difficult to foresee what time you would be ready to make tracks back to Arillas at but you could pre-book a taxi using the taxi office at Kavadades.
The lads there speak good English so it might be an idea to give them a ring asking for an idea of the price.
Stamatis, Dimitros or Spiros....0030 6972 767803
Eileenx