This is a constant question we get! In fact, we blogged about this topic before but since methods are constantly changing we wanted to explore the topic again.
If you want to get ahead of the planning we recommend starting at least 18 months before your event for a mid-size incentive trip (75+ rooms per night room block) and 2 years lead-time for over 150+ room per night. Though 18 months sounds like a huge chunk of time, there are several reasons why we recommend this :