If you have a moving blanket, lay that over the cooking chamber; it will help hold the heat. I have a Black Diamond and use it when it is really cold and windy. It really does help.
Also, not sure what you are using to watch the temps inside, but a Maverick is helpful. The temp gauge on mine is really not useful.
Just my 2 cents.
- Life Is Good, But BBQ Is Better!
- BWS - Fat Boy
- WSM 22.5
- A bunch on other outdoor cooking stuff.
- KCBS CBJ# 58657
- MABA Member