I don't think anyone can promise you that your LCD won't crack. I am not familiar with the E18 error. Physical damage can generally be reduced by storing a camera properly during transport and being careful during use.
I took my SD200 with me to Japan and used it to take most of the photos you see in this article:
Mac DevCenter: Japan Primer for the Mac Techno-Tourist
The camera returned with me undamaged and still in operation. Of course, I placed it in a small padded case anytime I was not actually taking photos. So, that helped it avoid damaging the LCD.