I found with zero nic I was irritable and restless for a couple of days (nic withdrawal) and, yes, a bit foggy headed. As the weeks went on I vaped less frequently until I stopped vaping completely.
My problem was I then got drunk and, because I didn't have any juice with nic, I started smoking again. (I have managed to transition back to vaping. Thankfully!)
As long as you avoid the last bit, you should be fine. Enjoy your holiday