reflextics - well the shiny bubble wrap type stuff

[TrainChaser]

I don't really understand the worry about the lights reflecting off the Reflectix. Stealth in a WM parking lot seems a waste of time. If the light is reflecting into other rigs, they need curtains. Or, park UNDER the lights. Around here, the lights are positioned about 150 ft apart. Or, angling your rig so it's not at a right angle to the lights might help.

Don't try to use Duct Tape where it's going to get hot. Use Gorilla Tape, instead. I've got a 'temporary' Gorilla patch on my metal garage roof that has been there for 3 years. Just checked it, and it still looks good.

The heat is trapped in your van, w/o a fan.