We are in Sacramento and it sounds like you must be up in the mountains.
We park out Class C on the side of our house and covered. Have you considered a heavy duty canvas tent or do you need the insulation?
This is what a neighbor uses: https://www.ecanopy.com/shk-14x42x15hsk.html?Choose%20Color=Grey&gclid=CjwKCAiAtdDTBRArEiwAPT4y-z8125CepFP6-yn9JwH4q9-e72CgeNy5kH_YewMfzGjpIFPsXyiJGxoC46IQAvD_BwE&refnum=Feb-721-9756
More: https://www.farmtek.com/farm/supplies/prod1;ft_canopies_tents-ft_daddy_long_legs_canopies;pgdaddy.html
Another: http://www.rv-shelters.com/?gclid=CjwKCAiAtdDTBRArEiwAPT4y-1LvQrxDRtcT9hXc-2cVnf_wUzM6mYw4EuIoKx-fK-a1edUrgrp62RoCYgQQAvD_BwE
