One more update for anyone with range anxiety, this is for a Model 3 RWD (long range).
I went to Iowa City yesterday. Left far southwest Omaha with a full charge (~307mi), drove 261 miles and arrived at the Coralville supercharger with about 30 miles remaining. This was going ~80mph most of the route with a full load of cargo.
Charged for 13 minutes, added about 100 miles for $2.60. Drove around town a bit, and got back to the supercharger with about 100 miles on the car. Charged for 70 minutes while at dinner, $9.10. Had just a bit over 300 miles range, drove back. Car was concerned I wouldn't make it without a stop in Des Moines so it kept telling me to go below 75mph. When it hit 3% estimated at destination I dropped below 75mph, turned off the A/C (it was cooler at night) and went slower through Council Bluffs and Omaha, ended up at home with about 20 miles remaining. This was with no cargo, but I think the grade is slightly uphill going westbound.
Almost all of the highway driving was on autopilot, which was wonderful.
So Iowa City is about your max distance between full charge
- next time I'll probably do a 20 minute stop in Coralville and 20 minutes in Des Moines as recommended.