I get my M151's insurance through Hagarty in Canada. One of the things include is to be on their mailing list for weekly stories and collectible car news items.
Sometimes there are heroic tales of roadside self-recoveries and family sagas. One I recall was a chap whose garage seemed to be a passing parade of donor cars to keep one (or two) of the same model on the road for a few decades. It was the typical tale of spend a bit more than he wanted to buy a car for 'that' one part, only to be given a much better example a week later.
The story here suggests a few essential tools, not all of which are necessary for HMVs. But being prepared is usually about having and not needing vs needing and not having.
https://www.hagerty.com/media/mainte...ustom-toolkit/
and
https://www.hagerty.com/media/lists/...urday_RoadTrip