Ever since our kids were babies, we've traveled a lot. We have family in California where we grew up, my dad's entire side of the family in England, and a smattering of extended family in all sorts of places. So, we've flown airplanes and done 12 hour drives since they were wee ones. It was never a negotiable thing; seeing family was important and we were going to do it no matter how tiring it, stressful, or expensive.
That said, it is soooo nice traveling with kids who are a bit older! I think this was one of the most enjoyable trips we've ever taken by plane. Grant is 8, Dean is 6, and Lael is 4. All this will change, of course, with the addition of Dorothy, but getting a taste of easier travel gives me hope for the days ahead.
We flew American Airlines this time because of price. Buying 5 tickets makes that one of the biggest factors when purchasing flights. I don't like that, but it's just the truth. So, we were subject to their new fee structure. They charge for everything! They charge to check bags ($15/each way for domestic flights), they charge for snacks, and they charge for headsets. You can have one carry-on per ticketed passenger and one "personal item". As our kids could help, we actually only checked one bag for $30. So, we had 3 small rollerboards, one camera backpack, one laptop backpack, and my purse all to carry-on. We checked the stroller at the gate (allowed free), and we checked the two booster seats (allowed free) with the checked bag. Honestly, one more rollerboard carry-on could have done it if all of our toiletries hadn't been an issue because of the liquids rule. That's why we checked that one, allowing us all the bathroom stuff we desired! We did have to switch planes on the journey from Nashville to Orange County, but everyone knew their job and we did it! I'm so proud of the kids for pulling their weight (pun intended).

Now that the kids are older, we successfully kept everyone happy and busy and not fighting for all 5 hours of flying with this:
-coloring books
-laptop and a DVD for the long leg of the trip (using our own earbuds thankyouverymuch!)
-a few games on the iPhone in airplane mode
-snacks (no $4 chips for us thankyouverymuch!)
I ran by
Half Price books the day before travel and got all this for about $15. Each kid was able to pick a reader and a coloring/activity book:
Back to the snacks- having something to nibble helps pass the time, and keeping it healthy ensures that the munchkins aren't acting out because of sugar coursing through their veins. I bought some Sweet and Salty granola bars as the treat, but had beef jerky, trail mix, and fresh Clementines for more substance. On the way home, we did have some gummies and amazing muffins from Grandma stowed in our carry-on along. Treats and bittersweet reminders of what we were leaving behind on our trip home. :-(
Traveling with this age group was nice, too, because we could rent a sedan. Bigger carseats can make a sedan impossible with three kids (they don't all fit in the back row), but now that Grant can ride without, and Dean and Lael have the very compact boosters, it was PERFECT. I still love our van at home for the captain's chairs and cargo room, but the Maxima was super doable and a very fun drive (that thing starts with a *button*. Seriously, people, a button!)

Eric and I have our own traveling routines and "jobs" that we've settled into over the years. We rarely even have to talk about it. I pack for everyone but him. He puts the bags up in the overhead while I get the kids seated and fastened and happy. When the plane de-boards, he gets the bags back down. At the end of the trip, he's the re-packer while I take care of the bathroom bag stuff after each family member's showers. I love it... the routine and the teamwork! :-)
Random things to add (I might add more later if I think of anything):
-I always insist that the kids thank the flight crew as we exit the plane
-Ask for the can when requesting drinks so that you can give them a *small* amount in the glass that way spills are less of a gush, and more of a trickle (also, go for water or clear soda- no stain!)
-we found out that Dean is super sensitive to the ear pressure on take-offs and landing and made sure to have gum at the ready (it kind of helped, but so does yawning if your child can do it easily)
Anyway, the biggest encouragement I can give other parents who are nervous about carting their kids through airports, and lugging luggage is to JUST DO IT and HAVE FUN. It just gets easier and easier with each trip and your children will have life experiences that are irreplaceable and educational.
train between terminals at Dallas/ Fort Worth airport.
Standing in the front makes it super fun. Zoom!