Riverrock, I use a properly folded map with a plog bulldog clipped to the back, this is small enough to handle and solid enough to write on. I use a retractable sharpie to write on map and have laminated both plog form and knee pad form so I use the same pen on everything. Retractable Sharpies can by bought from Rymans. They are pretty chunky but easier than pulling caps off and inevitably dropping them on the floor at some point!
Caber
