Anyone here using semi-flexible (not roll-up) solar panels? The OP may be amenable to this genre.
My future buy would be a ~~30% flexible panel in the ~120 to ~144 watt range around 4.7 LBS, with between ~22% and 23.x% efficiency. It looks like all the higher end "thin film technologies" these days are achieving in the 21% to 23.3% cell efficiencies (NREL; Solar Frontier; EMPA; Solibro; etc...). I would carry a solar panel backing made of 0.5 inch XPS insulation (weighing almost nothing). This would be a portable/movable panel of course...
