Hi, We are flying SWA. Both of my boys now use booster seats. From what I understand they are not airline approved. I'm fine w/that as I think both my boys will sit nicely on the plane w/their lapbelts. How can I transport the boosters so that we can use them in our rental car in FL??? Can they be gate checked? How has anyone else done this previously? I know we can rent boosters from Alamo but at $9/day it seems a little ridiculous because I could easily buy new ones for what it would cost. If anyone has some info and their personal experience I would appreciate it....