I took delivery of my S85 in March and put about 1500 miles on it exclusively driving locally in the Bay Area. Due to my daughter's volleyball tournament in Reno, I decided to try out the Tesla on a long roadtrip. I'm relaying my observations here in case others are interested.
There were a couple firsts for me on the outbound leg:
* First time using a supercharger (charged successfully - everything worked!)
* First time charging to Max Range (instead of standard)
* First time seeing the tire pressure warning indicator flash (briefly when driving over a bridge in Sacramento) then it went away and never came back. It was kind of alarming because it said to call Tesla service. However, it went away after 30 seconds and never came back.
According to Google Maps, a direct route to Reno is about 240 miles and should take 3:47 with no traffic. Of course, I used the SuperCharger in Folsom. With the need to route to Folsom instead of proceeding straight along I80 the whole way - I only added about 9 miles to the trip.
With the 85kWh battery, I had plenty of range to get to the Folsom SuperCharger and then to get from the SuperCharger to Reno. The first leg of the trip was primarily dealing with East Bay traffic during rush hour and I was able to go 132 miles averaging 322 Wh/mile. I had charged to 266 rated miles and ended up at the Folsom SuperCharger with 116 rated miles left. I had to circle around the outlet mall a few times trying to find the SuperCharger. I thought I could find it by locating a big obelisk with Tesla logo in the sky. Big disappointment. The Folsom SuperCharger looks like most other EV charging stations and its tucked away across from the Forever 21 store. I would advise others to look for the Mexican restaurant next to the Forever 21 store. The SuperCharger is on the far side of the parking lot across from these stores. I was really surprised at how easy it was to use a SuperCharger. Literally, I just plugged it in. It was even easier than using a regular EV charging station. Needless to say, the Tesla charged up to Max Range way way faster than it took for my daughter to finish shopping at the outlet mall.
The next leg of the outbound trip was interesting. Again, 85kWh offers plenty of range, but the incline on I80 going to Reno really forces the energy consumption to go way up. At one point on the climb, it took about 2 rated miles to go one physical mile. I was not babying the car. I drove it at the speed of traffic - we would pass trucks that were chugging along in the right lane. Occassionally, there would be these manics that would blow by the pack of cars I was drafting behind. Still, the Tesla was guzzling up the electrons. After crossing the summit, I got some efficiency back on the descent. In total, the trip from Folsom to Reno wound up being 130 miles with an average of 378 Wh/mi. After topping off in Folsom, my Tesla had 88 rated miles left when I pulled into the RV stall in Reno. The RV stall had a 50amp 240V plug and I was able to charge back up to Max Range overnight.
The net of it was that I didn't have to change my driving habits at all. Range anxiety was only an issue in that this was the first time I've ever gone on a roadtrip and observed much higher Wh/mi consumption. Having done this and removing much of the unknown, I would be really confident doing this trip again and not even thinking about changing my driving habits. Actually, to be specific, I would be confident doing this trip again in the summer. With cold weather, there may be a few more considerations that I will watch for.
I head back to the Bay Area soon and intend to post a followup comment regarding the return legs (back to Folsom and then to the Bay Area). Let me know if there are any questions I can answer. I learn a lot from the others who post on this board so I wanted to try and give back what I could.