Thanks for your insight. If no written documentation exists regarding a course, but there is significant evidence on the course of old features, does this, in your opinion, make a course any more or less restorable?
Sorry my answer above is still a work in progress as I continue to revise it.
To me, the course is restorable because the features are still in the ground, you have alternatives such as probing, where you can try educate yourself to what was once there. I do think that it now becomes important to find one of the following: an aerial, a few photos, a working drawing, a written review in the eraly years of the course before proceeding. One or more of those will start to remove some of the shades of grey.
I do think if an architect is not sure, they should ask a club for time to learn. I asked Lookout Point for (and received) a full year to study Travis because I felt I did not know enough about his work to help them with their bunker renovation. It turned restorative once I understood what I was dealing with. Clubs need to undeerstand a year like this is noit a lost year.
In your example, finding the course seemingly intact, but the architectural history unsure. The best advice is to hang on for a year and go search anything they can find on the history. It can be found, if you are willing to look - and often to travel to a better resource complex like the National Archives, The USGA archives, to see a well known collector, or even using a facility such as GCA. I have lots of stuff from this site, particularly from Mr. MacWood.
Kyle, you might have to encourage the course in your example to stay as it is, rather than risk damaging it through decisions based on upon guess. Don't you think a lot of the links courses sort of fall into your example