Unfortunately, she said even the sight of them makes her afraid. I am the same way about large spiders. Lizards? I live in AZ and I could sleep with one in the room (although I probably wouldn't).
I have never seen a lizard attack a human, or even allow a human to get close enough to touch it - they are very nervous and scared creatures themselves.
But as far as ports of call. I recommend Alaska, the Baltic Sea, Norway, England, a European river cruise....
I have never seen a lizard on any of those.