No, you're not overthinking it at all. Your thinking is exactly on track. Airports and minis generally do not mix well at all.
Topkick and ColdThunder are leaving a day before me, I will be with the family on the 4th of July and won't be leaving to Columbus until the next day. So they'll taking my minis and gear with them, so all I will have to bring with me is my luggage and carry on (I'm loved
).
If you are brining minis with you on a flight, take them in Army Transports or something similar, and make sure they are VERY well padded and secured, and be prepared to take every tray out for security checks. They will not allow you to carry on minis, secured or otherwise, so they'll all have to be checked in. And bring some Super Glue with you, you'll inevitably need it.
SP