If you have any appreciable cross-wind, you need to find out your average drift angle, not just to set your heading on the DI, but to see where you are going.
Its a bit like driving a rally-car, most of the time you are looking through the passengers window, or your driver's door window.....
oooh, and here we prefer to use permanent marker pens on the chart, with a White-board pen for removing the marks.
Anyway, have fun, and I hope you get some decent weather soon....