I'm planning a 640 mile, each way, road trip with my Dual Motor. All of the planning apps say I can make my planned trip on 2 super charges starting at 95% and never going below 10%. But I have very little >50 mile trip experience so I'm not confident in range estimates. Also, I will be going over mountains in late fall or winter, so running the heat may be an issue. Looking at various maps, it seems like there are enough spots along the map that if I get in "trouble", I can hit a J-1772 charging station to pick up an extra 20 miles of range to limp into the next supercharger. I can find them with plugshare. I am looking for recommendations on what prep I should do to be ready for this. I think I should get a ChargePoint account and have the app on my phone. Is that enough? Are there other networks I should have an account for? I may never use it. But I want to be ready if I have problems.