Yo Ellen! Congrats!!! One of the big things for me was ordering the dual pane windows and extra insulation in Ten Forward. For many years camping in my Scamp, I dealt with condensation on the windows and tons of moisture, especially during shoulder seasons. One year later, I have no regrets that I ordered both. I'm happy with my decisions! I didn't get either the foam insulation or the heat pads. I already know how I may need to deal with conditions where I may have wished I had both.
Good luck, fun times ahead