Re: flying with a 3mo old?
Bring a stroller even if you wear your baby. Going to the bathroom wearing a baby can be done, but it is not fun or pretty. Plus, you can wheel your purse and diaper bag (the only carry ons I bring) through the airport and gate check the stroller. You don't have to pay to luggage check your car seat. Do bring a birth certificate b/c apparently some airlines (SW) can't tell that a 3 month old infant is obviously younger than 2 and can be a lap child. Or they just like to scold mothers for forgetting to bring paper work.