Hagerty wouldn't insure me because my truck was too ugly.
FYI.
I'm currently using AAA. It's not agreed value, but book value is a few hundred more than what I've got into it, so it's all good.
In a few years, after I've got it prettied up a little, I'll try Hagerty again.
As for comprehensive coverage for the trip... I'm not sure who can do that for you. Have you checked with your regular agent?