Is there a website for trip planning, giving distances between super chargers and destination charging options?
Yes, several. The most popular one is EV Trip Planner (https://evtripplanner.com).
I should have added that the best site for finding charging options is https://www.plugshare.com.
You can plot on supercharge.info as well.
Someone was recently hawking a new app they wrote.
www.upercharge.info combined with
That will replicate what is offered inside the car on-screen.
For superchargers only, I also like https://supercharge.info, which shows both existing and soon-to-come superchargers.
Re: Trip Planning. Do you think the day will come when there will be numerous "stations" at all freeway exits with signs that post their "price per kW" ? Is selling electrons going to be a viable buisiness for "chains"?