I am flying F for the first time in August to Chicago... when in J or lower I always try to be one of the first in the queue so I can guarantee overhead locker space. When in F on a 744 is this ever likely to be an issue? If not then staying a little longer in the lounge and turning up towards the end of boarding would be my preference... we are in 2A/2K going and 3A/4A coming back.