I am going in a couple of weeks and I have a Nikon D90. I used to have the Nikon 18-200mm f/3.5-5.6 G ED-IF AF-S VR DX Zoom , which I call "the beautiful lens"

.
But alas that was stolen and I have only the 18-105 version. THis lens is not bad but it is not as good as the 18-200 at the short end and of course it won't go out to a true telephoto distance.
So I am looking at renting the 80-400, which is a decent VR lens. But it is a monster, 3lbs. and is not unobtrusive.
I am actually about to talk myself into getting another 18-200mm because it is so perfect as a single lens solution.
Any ideas? Keep in mind I have a DX, and I will be in mostly very sunny situations - pool, beach, ferry, island, jeep, etc.