I am starting to put together a vacation trip. It will be part business and part pleasure; we won't always be going to the same places or doing the same things. I'm more than a little scatterbrained and I am worried that I'm going to miss things.

Is there good software or a service for travel planning.

I have used TripIt Pro, TripCase, and Worldmate. (I have an alias that forwards into all three, but I find TripIt is almost always best at figuring things out. (I haven't tried Kayak yet.)) All the details so far are in all three services.

I'm looking for something that will, at least, let me see gantt charts of where we will be and what we will each be doing. It needs to show local times as well as the elapsed times. Using straight calendar appointments I find myself getting confused by time zones.

Ideally I would love to have some intelligence that would say "I notice you don't have a hotel for Lake Como."

I also want to minimize data entry, especially around changes.

I use Google apps and Office 2013. I'm reasonably technical.

Does such a thing exist? I would think it would be a necessity for people who are planning complex trips for teams. Just getting my girlfriend and I around southern Europe is taxing my ability to keep details straight.

TIA,

Dan