I signed my hubby up as an Alamo Insider and booked a minivan under his account using the Sun Promotion deal. I was told by someone on this board that I would be able to add my FIL on as an additional driver for free when I checked in. I started the online check in just to make sure I knew what information I would need, but it said an additional driver would be 9.99 a day. Am I doing something wrong? Will it take off the charge at the end? I didn't continue on with the online check in.