I made the trip from Sunnyvale, CA to Boise, ID in late July, and after looking at various route options with EVtripPlanner, decided to go direct from Winnemucca to Boise, and back without making any charging stops. Of course summer is easier, since you don't need any heating. Traveling at 55 MPH was faster than making any sort of charging stop, such as at an RV park in Jordan Valley. I have an S85 with Autopilot, and here is a summary of the notes I took:
Winnemucca to Boise (net elevation drop)
- left Winnemucca with: 264 RM @ 2:28 PM PT on July 25
- arrived Boise with: 38 RM @ 8:10 MT (4 hours, 42 minutes)
- TACC set to 55 MPH, until the last hour, when I increased it to 65 MPH
- used AC most of the way, since it was 90+ F outside
Boise to Winnemucca (net elevation gain)
- left Boise with: 267 RM @ 4:58 AM MT on Aug 2
- arrived Winnemucca with: 16 RM @ 8:45 AM PT (4 hours, 47 minutes)
- TACC set to 55 MPH, until the last hour, when I increased it to 65 MPH
- no AC or heat, since it was slightly cool outside (~65 F), and very comfortable inside
Both ways, I made the trip from Sunnyvale to Boise in one day. Since I love to drive, it was a very relaxing way for me to spend 12-13 hours. Other than the range charge in Winnemucca, for the trip to Boise, most supercharger stops were 15-25 minutes. Candlewood Suites in Boise was very nice, and I used their HPWC after arriving, and the night before leaving. I was at a different hotel in between, and ended up not needing to charge during the week. With energy savings and range mode enabled, I only lose about 1 RM overnight (on another trip, lost 18 RM with 14 days of not touching the car). I just missed the Boise supercharger opening!
EVtripPlanner was very accurate. On all segments, I ended up using slightly less energy than it predicted. Great tool!