I agree for cars... but travel trailers? 5th Wheels?..... ok if you drive them a lot on slush, snow, salty roads... but the summer use...
Had one for 5 years.... when I traded it in, no signs of rust.... actually my 3yr old Sierra undercoated against rust, was showing 3 times more rust than the TT had!
I think this is more of a dealer scam to get some money out of your pockets more than anything!
2014 JayFlight 28BHBE (replacing a 2009 Kodiak 25QS)
2011 Sierra SLT CrewCab 4x4
1200/12,000 Equal-I-Zer Hitch