Because watercraft is usually covered by your home or renter's insurance. The trailer can either be included on your home insurance or on your auto insurance but you must have the trailer listed on your auto policy in order for it to be covered there.
Mold is usually excluded from coverage. Read your policy; if same is not excluded, it is included.
no - damage by insects is excluded
"There is a group called Out-In-Africa which provides 4x4 insurance coverage. 4x4 insurance coverage is set up mainly for those on safari in 4x4 vehicles. They cover loss or damage on 4x4 vehicles, trailers, motorcycles, caravans, and watercraft. They also provide medical emergency coverage."
They can. Trailers a not a well-built as most houses and so are more easily destroyed. That said, some weak tornadoes will damage trailers but leave them mostly intact.
Flood is excluded
Typical damage from an F1 tornado includes badly damage roofs, overturned or partially destroyed trailers, and broken windows.
you can but its not covered so I wouldn't bother
Class A
No. Damage done by a tenant is specifically excluded on a dwelling policy. Tenants are considered insureds under the policy and damage done by an insured is not covered.
No damage to motor vehicles is specifically excluded
Typical F1 tornado damage surfaces peeled from roofs, windows broken, garages and porches collapsed, trailers overturned or severely damage, and trees knocked down.
You should insure any vehicles you have, including tractor trailers. You should carry insurance on them even if you are buying them to sell to others because otherwise you will have to pay yourself for any damage to them.