JohnR wrote:
Have the sensor cleaned before leaving, rent or buy a Nikon 18-200mm (or 300mm), fit that and don't remove it from the camera for the whole trip. Your sensor should not get dirty. Perfectly adequate lenses as long as you don't go out to max zoom,
Thanks for your input. I actually had the sensor cleaned and mounted my 18-200, but I like to use my 10-20 for landscapes and in crowded cities. I know, it’s a trade off but a once in a lifetime photo opportunity. Life is a crap shoot so I’ll hope for the best.