My wife and I will be in Sicily in May and in Taormina from perhaps 23 May to 28 May. We would like to go on a couple of organized group day tours (not expensive private tours) in particular a tour to Piazza Armerina (that does not include Agrigento which we are going to from Palermo a week earlier). It seems that interbus.it has a barebones tour to Piazza Armerina for 18 euros. Sicilyexcursions.com shows only a tour that includes Agrigento. Any advice on good tour operators that do Piazza Amerina? Also, how inundated with tourists is Taormina at the end of May?