Income Leave Averaging + Vacation Question

Hey folks,

Currently, I’m 26 years old and am looking at applying for ILA when I turn 30 (in 2029) in order to travel the world. I understand the max that I can request is 3 months however I was curious to know if regular vacation can stack with ILA? For example, is it possible to take 3 months ILA and then extend a holiday by 4 weeks (regular Vacation + personal days, etc?)

Also has anyone done something like this before and have any advice for the application/ talking to management?

Thanks in advance 😊