I got dual panes on my FR 2016 TT this year, and camped last weekend on our land in central Wisconsin. Nighttime temp dropped into the upper 20's. Not a single window fogged up. Make sure you get them on the patio door to if you upgrade. I also did the double insulation R14 in roof and ceiling, and the R38 extreme weather package.
Cranking up a movie inside with a Vizio 5.1 sound bar inside, and stepping outside for a few moments, I could barely hear anything. It does help with noise inside and out. And I was camping alone, as I had to close up for the season at the end of the weekend.
1994 Damon Hornet 27R
2008 Wildwood PT- 392FKTB (For Sale)
2016 Wildwood 4092BFL (Still Getting Fixed by Dealer After Production)