Reading A Shau Valor by Yarborough and I was surprised that when the camps were overrun, they didn't go back and build bigger camps. I would think any camp they left alone wasn't really in their way.
Do the strategic games allow you to invade Laos and cut off the Ho Chi Minh trail as a viable strategy? If so, I think the CIDG camps backed by ARVN conventional forces could have worked. Against conventional NVA troops in country, it would make it very hard for special forces to operate.
Most allow some kind of incursion. No Trumpets allows a full blown invasion. One of the problems though is no one really knows what the consequences would be of such a strategy. Hard for a game to model such a radical departure from the historical record.