Progressive. I wouldn't have anything else.
They will insure it for what you paid for it for as long as you own it.
In other words if it is totaled ten years from now and you have kept up with your annual premium you will still get what you paid for it.
I wrote here after hurricane Irma how they immediately paid us what we paid for ours.
If you want the whole story, I'll gladly rewrite it here with all the details and what it cost us.
We now have another trailer and have the same policy with them.
Guy