Chiming back in. Rocky's approach was what I did on my way back to Cali from Boise. Sat for an hour having breakfast at Say When and had about 30 miles added (I only have a single charger in my 85D). Worked out perfectly. My concern was that the charger would be out of service and i would need a contingency plan. I did call the Sawtooth in Orovada as they have an RV park but speaking with the attendant made it seem that it would have been hit or miss on getting a spot to charge. Thankfully, I didn't need to stop for a charge there. As an aside, Say When would be a perfect spot for one of the smaller superchargers! Unfortunately, no pending superchargers here on Teslas map. This is the only stretch of the trip that causes any kind of range anxiety.