Totaled my fifth wheel, how to work with insurance adjuster

Have your evidence too. Nada value, comparable rigs prices for sale. (The most inflated dealer prices you can find) Remember it's not your job to search for the deal of the year price. Value is what will readily replace it comparably or in kind.
Tell the insurance to pack it if they don't offer what it willl cos to replace.
All goods, accessories, loss of use, etc.