Belfast (~10 miles away) is probably a better location, covering both Rt 1 and Rt 3 (Augusta<->Ellsworth).
Tesla knows where all the cars travel and at what state of charge, and where drivers charge/need to charge. It's obvious from the Find Us map that their data shows most drivers are traveling on the 95/295 route up the coast to Bar Harbor.
For most drivers, Camden is a destination, not a rest stop. Even if you are doing the coastal route on Rt 1, there are Superchargers in Freeport and Ellsworth, 125 miles apart. Camden would be a fill in, not a necessity.