Recent summer camping confirmed the need to block heat gain from the cab area, there have been other threads about this. We also noticed a lot of heat gain from the shower skylight. In addition, occasional camping spots with streetlights allow a lot of light into the bedroom area through the skylight.
We purchased a set of cab window sun shades from Heat Shield. During that transaction we discussed the shower skylight. They made and shipped us a sun shade for the skylight. Untried yet, but should help.
