After pricing out a few airlines, we've decided to fly. It will be $700-$800 for the four of us, we can gate check a stroller, and after 2 hours we'll be at our destination. Disney picks you up at the airport and brings you to your hotel with all of your bags. With a 3 year old and a 7 month old, it is too convenient to pass up. We won't be renting a car (and therefore won't need car seats) and can use the Disney travel system. Yes, we know it takes a bit longer than driving your own car, but its a sacrifice we are willing to make.