How to strategically take Tadalafil(Cialis)?

Hi, partner and I are off to holiday soon and wondering what is the best way i can take Tadalafil?
In my experience i have taken this 2 hour before on an empty stomache and then have a light snack 1 hour before.
As we are going on holiday I would like to be more spontaneous, what has your experience been like trying to be more spontaneous with Tadalafil(Cialis)? I am thinking what if I take it the night before we fly as it remains in the system for like 36 hours