I can help on the sensors. They are cheap junk and often either just stop working or are covered in crud. Lots of posts on all kinds of subjects including yours in the search bar above. Another way to learn about sensors, cleaning and keeping them clean is the many youtubes you can find on the internet. On the windows are you intending to camp in the winter or just storage. We keep mylar coated bubble wrap sold as "duct wrap" at Lowes, etc. It insulates the windows by keeping out the sun to prevent heat and fading in the summer and fading in the winter. We used it late fall camping to keep the place warmer and at Moab to keep the 108 degree sun out in the daytime. Works both ways. But it also keeps all daytime light and view out so maybe a window coating could be used.
Last part, hay bales? to be honest I have no idea but others will chime in.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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