What might have happened to the 1976 Bicentennial Rededication Scrolls?

I would start with the organizations that had a direct role in making or receiving them: the event commission, the scroll sponsor, and the institutions involved in the Valley Forge ceremony. Their surviving records might show whether the scrolls were inventoried, transferred, or stored after the event. That is a research route, not proof that any particular organization still has them.

Useful records could include correspondence, shipping paperwork, meeting minutes, storage bills, and final financial reports. If the records stop at the handoff, that would narrow the timeline but would not establish that the scrolls were destroyed.

The scale matters here. Hundreds of thousands of separate scrolls are a major preservation and storage problem, especially if the event was already short on money. They may have been divided among locations or people, rather than kept as one complete collection.

I would be careful with any simple story that they were all thrown away or all remain in one warehouse. The available description establishes that they were collected and brought to the finale, but not what happened afterward.

Local archives along the route could be worth checking, particularly where signing stops were organized. Some scrolls might have been retained locally as keepsakes or deposited with a library, historical society, hotel, or civic group. That is a possibility to test, not something the source confirms.

Searching newspaper archives for later references to a donation, display, or cleanup could help identify specific repositories. I would also look for old event programs and commission records to get the names of local organizers before contacting institutions.

I would separate the question into two parts: where the scrolls went immediately after Valley Forge, and whether any survive today. A final inventory or transfer record could answer the first even if no physical collection is found. For the second, catalog searches may miss them if they were described simply as Bicentennial papers or event memorabilia.

Records from the national park and the state commission would be sensible starting points, but the evidence should be reported carefully. No mention in a catalog is not evidence that the scrolls were destroyed.