I have a Britax B-Agile and carrier system for my baby and we will be flying over the holidays. I was reading the airline regulations about traveling with strollers and many of them have size regulations for gate checking them and suggest that you bring an umbrella stroller. Now I'm concerned about my B-agile... it's not an umbrella and the folded footprint is kind of big!

LO will be 3.5 months when we travel and it looks like most umbrella strollers aren't meant for babies under 6 months.

Do you typically gate check your stroller and carseat?
Has anyone gate checked the Britax B-agile?
Should I be buying an umbrella stroller for traveling?