I have a few upcoming solo flights/travel with my DS who will be 2-4 months old. We have a nuna crib, but it's huge and heavy and not good to check on a flight. He is too big or too young for most the smaller options out there.

Is there something easy to bring?

Buying a cheep pack n play is less then the oversize bag charges by a lot.

I would co sleep, but at least one of these trips I'll be sleeping in a very squishy twin bed.