plan

I'm planning a trip that includes minor roads, but google maps doesn't show charging stations; where can I find a website like google maps that shows me the charging stations so I can plan my route without having to leave the office and use my Tesla navigation system?

I'm approaching 50k on my 2016.5 model s and am looking into the extended warranty options. I was thinking of only buying the 2 year 25k option in case I trade in. If I don’t, does anyone know if I can purchase another 2 years after that one or do you have to buy the 4myear all at once?