Some thoughts;
Unless you are getting an extended warranty from the manufacturer, you are more correctly purchasing an insurance policy. Only the manufacturer has a warranty.
It is little known that Forest River offers a great deal on a one year extended warranty, you didn't mention what RV you are purchasing.
Extended Warranty companies have a nasty habit of selling these insurance policies and when they start having to pay out, the company folds. The owners of the company then start selling the same product from a different company.
Consider that around half the money paid for that dealer offered "warranty" goes into the dealer's pocket. The dealer is 'upselling" you and is operating in their own best interest, not yours.
Build a life you don't need a vacation from.
2016 Silverado 3500HD DRW D/A 4x4
2018 Keystone Cougar 26RBS
2006 Weekend Warrior FK1900