AF-S NIKKOR 24-120mm f/4G ED VR
the SB900 is over kill for travel shots, what i think you might need with your D700 is just a fill flash that can bounce, eg. the SB400.
I normally like my shots with a hint of movement somewhere, it brings life to the still image.
so i shoot with a relatively slow shutter speed, somewhere around 1/15s ~ 1/25s to get some movement. add in a fill flash set to rear curtain sync and volia.
just pray for no camera shake
have a good trip