State laws differ but as an attorney I can tell you the at fault driver and his or her insurance company has the obligation to make you "whole," that is to pay for repairs or the cost of replacing whatever is damaged beyond a financially feasible repair. They also have to supply substitute transportation (rental vehicle) and, if you were living in the RV, substitute housing. They also are responsible for any medical expenses you have and pay for the pain and suffering you endure before you heal. If your injuries are such you never fully recover, then the award could be substantial.
Your insurance should not even be involved unless the at fault driver has no insurance or is underunsured, and you have uninsured or underinsured coverage.
With all due respect, you seem unsure how to procede and an insurance adjuster for the at fault driver could take advantage and get you to sign away most of your recoverable damages. Remember, that adjuster's job is to mitigate as much as possible the damages they have to pay for. They are not your friend.
You would be very wise to consider hiring an attorney to represent you, especially if you have any injuries. Be selective when hiring an attorney.