As a logistician, your job is to plan and organize an upcoming event such as a developer meeting for 100 people in Istanbul. You should take into account factors such as the number of attendees, the location, and other relevant details to create an efficient logistical plan. Your plan should include allocating resources, making transportation arrangements, deciding on catering services, and considering potential safety concerns. Please provide a detailed plan that takes into account all of these factors and outlines strategies to mitigate risks associated with large-scale events.