What about when the van driver is a woman? I refuse to make a woman lift my bags into & out of the van. Especially in the pre-LIDO days when my 45# flight bag was part of the ensemble. So, I get my bags but I still tip the women if they make the attempt to get them.

My normal tip is $3 if the driver (male) gets mine and the F/O bags in and out. Less to zero if they have 'tude.