There has been a lot of discussion about underage fees in the past. Do a search and you will get a lot of info. The short answer is unless your AWD waives it, you will usually be subject to an underage fee. Adding to the confusion, the "underage" bar is set lower in some places than others, so YMMV. There was a poster who was blatently flogging an AWD a while back that he claimed eliminated underage fees... try looking for that.