Greetings from the Florida Panhandle
First off, welcome to the Forums. We're glad to have you with us.
As to your question, we have spent almost 700 nights in our 2005 25FB in all types of weather condition in all parts of the country. We have never seen the slightest interior sweating. Our Airstream has the mouse hair/vinyl interior.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)