A report of my Tesla road trip below. Sorry to hear Boomer had serious difficulty with fast charge, and that the problem might be damage to the Frankenplug. Tesla Supercharger connectors also get damaged, but it seems much less frequently, and there are always more stalls to try.
Trip Report:
I just returned from a 1400 mile Tesla road trip circumnavigating the California Sierras counterclockwise. I have previously done this circuit clockwise with some difficulty because of the lack of SC along Highway 395. With the recent opening of the Reno SC, 395 is now fully connected.
I used SC in the following order: Inyokern (brief, the mini-market is grim), Lone Pine (nice 15 minute movie at the film museum is just right), Mammoth Lakes, Topaz Lake, Truckee on the way north, plus I received overnight L1 charge at the Creekside Inn in Bishop, a nice motel recommended by another Tesla driver. The manager told me they are getting several HPWC installed end of June.
After charging at Mammoth Lakes I had plenty of charge to drive into Yosemite from Lee Vining as far as Olmsted Point, to see Half Dome from the back, and return to Lee Vining and continue up 395 to charge at Topaz Lake SC.
Tip for mountain travel: While I still had connectivity outside the park, I built a route to Olmsted point by locating it on a map, zooming the Tesla GPS to the same point on the road, marking the location with a hand touch, and recording the round-trip predicted usage back to Lee Vining. I zoomed the display back out to show the full route and moved the display slightly so it would not refresh. This way you can maintain your view of your progress on the map without connectivity inside the park.
From Topaz Lake SC I drove to Truckee to stay overnight with cousins. The next day I drove highway 89 to Chester CA, Lake Almanor, near Lassen NP was my furtherest point north, staying with friends and charging from a 240V 6-15 outlet in my friends' wood shop. Very green meadows along this route.
On my return trip on the west side I first drove down the Feather River gorge, which is very pretty, with lots of water, followed by a great lunch at the Sierra Nevada Brewery. I was going to get some QC at the brewery, but I didn't notice on Plugshare that they had a CCS fast charger, not CHAdeMO. I charged at Folsom SC, and drove to the McCaffrey House B&B on the Sonora Pass road. After charging overnight at their HPWD, I drove into Yosemite from the west, took pictures of the major falls in full glory flow, and drove up to the awesome view from Glacier Point.
Another tip: neither the Tesla GPS nor my iPad would recognize the Glacier Point road, so I could not get an accurate round-trip usage prediction, which led to some (unnecessary, as it turned out) range anxiety. So I set the route to my destination in Oakhurst for that night, and turned off the voice directions. That way as I drove the road to Glacier Point, I got continuous updates on how much range margin I had to reach Oakhurst. I was prepared to turn around if that margin dropped below 15%. I actually reached Oakhurst with about 25% margin.
On my way out of the Yosemite, I stopped to check out the charging at the very nice Tanaya Lodge. Only 2 L2 hoses, but the Operations Manager told me they are planning to install 8 HPWC !, hopefully by this Fall. I told him I was very impressed that they would make that kind of infrastructure commitment. Contrast that attitude with the lodge at Sequoia, that has no EV charging at all.
After dinner at the historic Wawona hotel, I charged that night on a HPWC at a Best Western Plus motel at Oakhurst. Oakhurst, at less than 3K ft altitude, was very warm.
On my last day I visited the Forestierre Underground Gardens in Fresno before charging at the new SC station at Buttonwillow. It has 10 stalls and a nice Starbucks, so I was surprised that there was only one other Tesla there, given that it is close to Tejon Ranch and they are always crowded. A steady 108F in the valley; fans going full blast in the car while I was charging. Despite not sharing a stall, I was getting only 50 kW of charge. I moved to another stall on a different charger and the power rose to 80 kW. Perhaps the first charger had become overheated from a previous charge session in the heat.
From Buttonwillow I avoided the San Fernando Valley by driving over Tehachapi to the Mohave SC. Along this nice divided highway I passed a car transport truck carrying a load of Tesla MS and MXs.
From Mohave I could reach home in Claremont driving the Pearblossom Highway. This used to be a bad road, and it still has bad spots, but they are actively widening it.
During this trip I saw others Teslas at SC as follows: Lone Pine: 3, Folsom: 3, Buttonwillow: 1, . All the others: zero, even though I was charging at prime times in mid morning or afternoon.
It was a good trip and I got to talk to a number of folks about Tesla.