I think the park Chargers are going to be "waypoints" with the intent that you will be there for hours hiking, and not need a quick pit stop. Same as Tesla destination ChargersFinally, if automating the point names isn't doable, I will probably have to defer to others who are interested in crowdsourcing some of this. In that situation, I can share the map through Google Drive to let others edit. More on that if needed.
This is a great effort, and I'm wondering how you and the community feel about crowdsourcing 'improved' guesses of the locations based upon local knowledge of the proposed sites. For example I'm very familiar with the I-93 corridor from Boston to Canada and suspect Rivian would prefer to utilize the Hooksett rest areas, which are south of the I-89/93 interchange (and have banks of Tesla chargers already) as well as the Franconia Notch parking lot instead of a location in Lincoln, NH (keeping in the sprit of Rivian's desire for chargers in parks 'where you play')
...I'm not certain if this is constructive or not...