That froil bed sure looks interesting, but they don't even post the pricing, just want you to email them for quote.
But it will not work in camper as it raises the mattress. My camper used to have 2" high storage under the mattress, but that made us banging our heads against the cabinet and due the moisture PO did not address, part of the wood was already rotten.
I was thinking about cutting insulation for the windows, but after house sale all my tools are in storage and our local HD sells polyurethane insulation in 2" sheets, what would be too thick. Still probably the best solution for front window on long run.
This still is one time problem for us as we are buying next house on Las Vegas desert and don't plan winter "camping" in the future.
That is why I am seeking easy solution that would not leave permanent mark on the camper.
Thanks for all the suggestion.