Question about Alaska and storm windows

soos,
When are you heading to AK for "summer" and where do you plan on going? Different parts of AK vary widely in temperature and weather patterns year round. Up here in Fairbanks in July it might be sunny and 80* during the day and 60* at night where on the same day in Kasilof it might be 55*, windy & rainy during the day and 45* at night.
Either way I wouldn't bother with storm windows if you don't already have them, and I've camped down to -30*F ambient without them.

Our Tc does not have the windows that you are asking about, what we used was (reflex) insulation, cut it to just slightly larger than the inside of the window. Then when needed we just pushed them in place for insulation or to block the light that happens longer into the night or early morning. When not needed we just slid them under the matress for storage. With the curtin pulled @ the foot of the bed and the Reflex in place it was like being in a cave.

I find them very usefull on cool / cold nights. I was in Alaska from May to August and we had quite a few cool nights. The good side is there is no fog on the windows when you heat up the camper, especially while cooking food, and it will be easier to warm up the TC.

Should be no need for them in the summer.