Mounting solar arrays to the roof of a Bigfoot

An update: now driven a few hundred freeway miles, panels appear to be staying put without problems. 200 watts seems to be plenty - even after the heater is run a bit overnight, if it is sunny, by 10 AM all is charged full again. I have actually unhooked the charge cable from the truck (another story) and don't seem to have to worry about power in the camper at all! One of the more worthwhile mods for your camper....