I've had Progressive for the past 10 years, and they have gone up about $100 a year on me each of the past three years.
Paying about $1200 a year now for max collision and liability coverage, plus trip interruption, alternate lodging, towing and roadside assistance. Actual Cash Value (ACV) is set a $70K, which is above my actual RV loan payoff.
I usually call them every other year and adjust my ACV, which I consider my RV loan payoff rounded up to the next thousand. That will drop my annual cost $120-$150, keeping me around the $950 to $1100 a year range.
Progressive has a 5 year disappearing deductible feature, which saved me $1000 when I had an accident and busted up the rear cap in 2010. I'm now back to zero deductible since that accident.