Our flight was pretty much flawless. Shepherd had a minor meltdown mid-diaper change in the lavatory and screamed for about 45 seconds.
Thankfully, we were surrounded by the most kind, generous, sweet people who went above and beyond to make sure we were comfortable, bought us snacks(!!!), put away and took down our bags, offered to assist me with the stroller/carseat nonsense and were just plain supportive.
Shepherd was a rockstar, and his fellow passengers loved him. I was so relieved and am so, so thankful to the nameless friends who helped a new mom in a daunting (for her) new situation.
Thank you all for your advice on traveling with an infant! It helped a great deal!
Now, we are off to enjoy time with Birdie and Poppy!