The accommodation will be held in the town of Agios Nikolaos in Mistral Bay Hotel( http://www.mistralbay.gr/hotel/welcome/) cost: single 37 euros/night, double 46 euros/night.
You will take the bus called ‘KTEL’ from the airport of Heraklion. The bus passes every one or half an hour. Here you can find the timetable with the routes. (see Heraklion-Agios Nikolaos). The time of departure in the table corresponds to the departure from the city center of Heraklion, you should add 10-15min that the bus needs to reach the airport from the station of departure. The ticket costs 7.70euros and the trip is around 1h 30min.
You will get off at the bus station of Agios Nikolaos (the end of bus). And then in 10min walking (see map) you will find the hotel in the following address
10 Marathonos & Milatou Str.
Agios Nikolaos 72100
You could also take a taxi from the airport to the hotel but have in mind that it is expensive, it will cost you about 80euros.