I've used chargers at both the Groveland CP and Buck Meadows EA sites, haven't tried the Rush Creek Lodge chargers as I expect them to be occupied by guests. Had some issues at Buck Meadows the first time (couldn't tap my phone, site not showing on the app map so couldn't activate it that way), but was able to get it activated remotely by CS after about 15 minutes. I used it once since then and the app worked. Tapping my phone has never worked at any EA site, so I suspect my phone, a fairly low-end model, lacks whatever capability is needed.
Took a couple of trips along 120/Tioga Rd. over to Lee Vining the past couple of weeks, so was able to check out the two EVSEs installed at the old gas station site in Tuolumne Meadows. You can't use them this year as they're using the site for parking/staging construction equipment as the road and campground are being upgraded, but currently there are a pair of Clipper Creek HCS-40R ('R' for "Ruggedized") on the east side of the lot, closest to the store/cafe'. I don't know if they're shared or not. I've been told by a park representative that they hope to add two more. I'd hope that they'd go with HCS-50s rather than 40s, as cars with bigger packs can benefit, as would sharing, and I think the transformer on site can handle 3 of them (six shared).
In emails with the relevant person in Yosemite I was told that these sites and all the rest in Yosemite were currently free, although this one had the Liberty Hydra charging keypad like the earlier sites, before Rivian offered to make them free through Adopt-a-Charger.
I strongly recommended that they should be pay, to prevent hogging and help pay for maintenance. I was told they do have the ability to add payment later if needed, although they had problems with the Liberty system's activation when they were using that. Payment has to be easy and reliable for the general consumer to trust public charging for BEVs, and as we all know that's often not the case.
Prior to my most recent trip I also sent an email to the Tioga Gas Mart/Whoa Nellie Deli in Lee Vining, pointing put the need for L2 or better DCFCs there. Got an email back saying they'd been trying to get charging for two years, and that they were currently waiting for an engineering firm in Mammoth to finish their planning and/or permitting work. They suggested I contact the firm, so I sent them an email but haven't heard back. Emails being easy to ignore, I'll probably follow that up with a letter in a bit.
I'm also trying to get EVSEs at Badger Pass, hopefully easily re-locatable to Tuolumne Meadows and vice-versa, so the chargers in both places don't sit idle six months of the year (summer at Badger, winter at Tuolumne). I sent an email to the Yosemite Conservancy, as they seem to be the main in-park agency involved in this, and offered to pay for two and possibly more EVSEs/pedestals, if they handled the wiring, installation etc. I may not have sent it to the right place as I've yet to hear back, so will try sending it again to someone else specifically involved with donations, and hopefully will get a response. If so I'll report how things go.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].
The 'best' is the enemy of 'good enough'. Copper shot, not Silver bullets.