I purchased five thermal blankets from Bass Pro stores.
The blankets are aluminum coated on one side to reflect heat.
I joined two blankets with Gorrila duct tape
Two blankets fliped so the aluminum side is facing up.
CLose up of the blankets before taping.
I've taped the ends of the blankets with aluminum duct tape and it is almost impossible to see where the ends are.
I added industrial strength velcro to one end of the blanket. The other side of the velcro tape was added to the PUP canvas just under the roof
Front bunk end covered by the blanket held in place by tarp clips. I got the clips from Harbor Freight - Big Top Tarp clips (P-91858). They are the same as the Progrop Tarp Clips.
Rear buck end.
Slide out - this only required one blanket.
All ends covered.