While parked in a storage facility, my motorhome got flooded during a storm. The water rose to about 3.5 feet, flooding everything housed in the basement ( inverter, converter, generator). Fortunatel...
you didn't say where in NJ South vs North you are. I had some Class a work done on my unit at Bellmawr Collision Center link to webpage
They worked well with my insurance company and did a fine job. Their only drawback is that they are very busy.. But with the type of damage you have.. you will need to get an estimate and have your insurance co. look before you go to far. Water damage is bad and like someone else said mold is a concern. plus electrical system damage that can be hidden.