Zamp has a nice setup, but wow that is pricey.
I, too, have been thinking about having 200 watts of solar and not attaching them to the roof. We do a lot of midwest camping in State Parks and National Forests with shaded campsites.
Here's a Renogy 200 watt kit for 1/3 the price.
Link hereIt isn't a suitcase, but could easily be made into one. You'd have to buy some wire for distance hookup, a fuse, and a couple of hinges if you want to join the panels together. But with panels that size, I think I'd rather have them individual to make hauling and storing a bit easier on my back.