does anyone have any good tips on were to book some cheap boat trips and is anyone goin on the 5 july?

Have a look at www.odysseydive.com
They do snorkeling trips as well as diving trips

Hi I am a regular visiter to Chalkidiki and are please to let you know there is plenty of local travel shops selling all the trips at good prices, including boat trips, they run two main trips one full day and one sunset/evening. please let know if I more help.