Please, Read the notice from Australian Embassy at http://www.embaustralia.org.tr/anzac/anzacdayatgallipoli.htm
A brief warning from the Australian Embassy web site: "Accommodation in the Gallipoli area, particularly for the night of 24 April, is very heavily booked well in advance of ANZAC Day. Intending travellers will need to make bookings as early as possible to secure accommodation."Notice: Before you book with any agency, it is most important that you check all the details of the services offered. Low budget offers usually don't cover many services, such as: quality, standard of the coaches, accommodation in Gallipoli, professional lecture about Gallipoli, private security, doctor, professional guide (not an escort or offsider), references of the agency and background.