Okay, Thanx Richard & labellafiore - I'll recheck with Progressive directly - which is where I checked originally, since we don't have Farm & City here in CA, or in SoCal anyway. It could be a state by state thing.
Did you two folks happen to notice that you're both from towns called Dewey - in AZ & IL respectively!? What a Quinky-dink!
Sorry for the OT diversion, but that was just too odd to pass up.
Since 2012 I have had effectively a Stated Value policy through AAA on both the Avion & Puck, but that really works as more of a "stop loss" for AAA, & they still go by current market value, then you argue with them to get up to that value, from what I understand. AAA doesn't call it stated value, but something else.
I do need to get Jim Polk to do an updated appraisal on them both & our 3 Classic Cars, but have some work to finish up on them all first.
For the OP nelson3
- you might try Progressive & AAA just using what you paid for the yet to be restored `55 Overlander (using your payment invoice, DMV tax receipt, etc.), & then see if they'll add a Rider for the value of the parts/supplies & work/labor on either your Auto or Home policy as you go along with the resto work.
For a classic car/truck or boat+trailer resto, Hagerty & some of the other classic/antique car insurers do have a specific restoration project policy to cover the vehicle + parts + work/labor that you can update as you go along, & I think that you can just update your policy coverage amount online yourself as you go along - of course paying a higher premium.
However, many of the classic car insurers including Hagerty will limit your use of the vehicles to car shows & events only, with only a few allowing a stated mileage per year allowed (priced by miles blocks/stages).
Ergo, Hagerty won't insure most VW Westfalia Campers & other Classic/Vintage RVs & Camper Vans if they are used for camping, daily driving, etc. - but the Vintage Trailer Rallies bring up the question if they are really a vintage/classic vehicles event, since most have a public show over the weekend.
Unfortunately, the classic car/truck insurers haven't yet caught onto the growing vintage trailer/RV collector trend yet, to want to insure them.
But then it takes them years to catch onto adding collector vehicles too, such as the VW 1980-92 Vanagon Westfalia line - which are low production eligible & have been collectable for 20+ years, but Hagerty only started insuring them with the above restrictions within the last +/-5 years!
Another issue is what you have to pay during long periods of non-use of your trailer(s), which can be a lot of sitting at home time if you have multiple trailers - so it's worth checking on whether you can get a lower premium for months of disuse sitting in storage or at home. I know Good Sam offers that for regular trailers, but they don't do Agreed Value for vintage trailers as far as I know.
AAA will not reduce our trailer premium - neither for the 15 months that our Avion sat at home 2018-19 while we took our "new to us" Puck around to all the vintage trailer & car shows/events, nor are they willing to refund partial premiums during the extended non-use during the current 2020 COVID pandemic (despite a CA order for insurers to do so on all vehicles).
I bring these aspects the OP nelson3's attention, assuming that they'll be using their vintage `55 AS for vintage trailer rallies & events too (in addition to any other use).