Here's my experience (all from last week).. I'm going to post in detail in hope that someone else can benefit from what I went through. I'm 48. Wife and I have perfect driving records. We do bump our coverage up to higher amounts liability wise. We run $1000/$1000 deductible.
I'm in Colorado - our rules are a bit different FWIW and a truck camper is NOT registered in Colorado.
The camper: 2019 Northern Lite Limited Edition with some upgrades - insured value $53,500
All quotes: Replacement Value (not ACV) - $53,500
Travelers wanted to treat it as a tow behind. I had 3 vehicles already with them and they wanted $1169/year additional for the Truck Camper. hahahahahahaha!
Safeco: Truck camper: $717.70 per year (if we move all vehicles to them).
Nationwide: $1162.94 for just the camper
Progressive: over $1000 more for the camper (they quoted everything but the premium was over $1000 more than what we pay for the current 3).
National General: $768/year just for the camper.
So then we called Geico....
We ended up moving ALL of our vehicles to Geico.
The camper premium is $24/month
(that is 5 years of replacement, years 5-8 - $53,500, after 8 years, ACV)
...and our premium went up overall like $18. (i.e. they saved us money on the other 3 vehicles).
the ONLY downside to Geico is they do NOT offer windshield coverage in Colorado - so we'll have to eat that (and we break lots of windshields due to the **** rock trucks in this area).
Hope this helps someone.