You guys said it all. As for traveling izemmom reminded me of a hairy trip across the country I took with my daughter. She was little, still in a rear facing car seat. I flew from Seattle, WA to Savannah, GA, requiring TWO plane changes, including a switch to another airline on the second change. Of course the airline change meant walking from one airlines arrival gate to the other's baggage claim area. It was about two miles, the shuttle thingie covered about half of that. I had her in her carseat, no stroller, and the diaper bag full of the usual plus toys, snacks, etc. When I got to the baggage claim area I had to load onto a baggage cart a fold up playpen, a giant hockey duffle bag(about 4' x 1')filled with the G-tube pump and a myriad of other supplies, my suitcase, her suitcase, the diaper bag, and then pile her in her carseat on top of the whole thing. I had to hold onto her carseat with one hand while steering the cart with the other. I was sweaty and frustrated and pissed that not one person offered to help ever. I look back and laugh now, but it sure wasn't funny then! It's gotten a lot easier since then, and we've added the vest to our list of stuff. Now she can carry her own stuff, some of it anyway!
As for what I would do differently, yes my parenting style would change. There would just be a lot less stuff to remind her about on a regular basis. Do you find that you're in a constant state of vigilance when you're with your kid? I don't even realize it until she's somewhere else for the day and/or night. I almost don't know how to act when I have free time. I sometimes stop to check that I have enzymes with me if I'm out to lunch and she's not even there! Doing normal things is different without her, just in the amount of things we have to be aware of that other people don't have to think about. You all know what those things are, there's a pretty good list compiled above.