We took ds for his first trip when he was 6 months old. I only had a week to plan and pack since dh came home from work and said lets go to Disney next week! He did great on the plane! We had a direct flight. The flight attendant even held him for a bit and took him up and down the aisle to show him off. He got a certificate and wings for his first time flying. We gave him a bottle at take off and landing to help with his ears. Our plane didn't have a changing table in the bathroom, so the flight attendant just told us to change him on an empty seat before everyone else boarded. If your little one will sit for a bit, I'd advise boarding first if you're able to so you can get situated. We didn't take his car seat, but did check it and his his stroller at the gate. We bought a seat for him also. It was just easier to have the extra room.
While we were there, we took it at his pace. The baby care centers were awesome! We took the time to chill for a bit in there so we could change his diaper, feed him in the high chairs and then took him in the "quiet" nursing room to feed him a bottle, hoping he'd settle down. (didn't happen!)
He LOVED the character buffets! I highly recommend them with little ones too. You can get your meal pretty fast and the characters do all the entertaining. We only had to give our son a bottle while we were there and the characters did the rest! We also took our stroller in the restaurants a few times when he was napping or about to nap. They didn't have a problem with it, it just took a few extra minutes for them to find a table that would accommodate a stroller.
There were tons of rides that he was able to do. He especially loved IASW. We rode that SEVERAL times! The baby swap is also soooo simple to use.
On our second trip with ds, he was 15 months old this past Nov/Dec. We drove from Maine on this trip. He also did very well in the car for that long of a time. It was soooo cute watching him RUN up to the characters and just about knock them over hugging them. Sooo cute! I always said I'd never stand in line to see characters, but found us doing so and had the best time! His expressions were priceless! He loved everything he did when we were there when he was 6 months, but just even more so. We'd get off one ride and he'd just say, "More?!". So we knew he was having fun! Some "Must do's" are Playhouse Disney Live at HS, Hollywood and Vine Play and Dine character breakfast and lunch, (We have 2 ressies for there this time. DS had SOOOOO much fun there!), Country Bears, Festival of the Lion King, Conservation Station, All the Fantasyland rides, Finding Nemo and Figment. We still took him to the baby care center for diaper changes and to just sit in the feeding room so he could unwind and watch a little bit of a movie. Disney makes it so easy to take children of all ages, no matter how little.
You are going to have a GREAT time!!! Just remember to take it at your baby's pace. Go back for a swim or nap if you need to or find a quiet place in the park if your baby starts to feel overwhelmed.
We also got his first haircut there at MK. I'd highly recommend it!
We're leaving next month when he'll be 2. Can't wait to see his expressions when he knows even more of the characters now. He's all excited that he gets to ride on an airplane. We'll still be taking it easy since I'll be 7 months pregnant.
If you have any questions, just ask or send a pm!