How does Spirit board? I know American does first class/elite, then boards back to front. Air Tran boards by zones (business class then the first few rows in coach for people who purchased those seats, then alternate back, front, middle-going zone 1 through zone 7). What's the boarding order for Spirit? Also do they usually have plenty of room for carryons in the overhead bins or are they like Air Tran where the last people on usually have to check their carry ons?