We are traveling by plane in May, and I think we'll use the kids'
carseats on the plane as opposed to gate checking them. This is a first
for us, but I'm thinking it won't be that bad...similar to strapping it
into the carseat with a lap belt. We have a Britax Boulevard and
Frontier (possibly two Frontiers by that point depending how fast DD
shoots up). Any experience? Am I underestimating how difficult they
will be to install on the plane?