Just drove ~6,500 miles in less than 2 weeks through 7 states and 2 provinces. California to British Columbia/Alberta (via OR and WA) and back constituted the first leg, then 2,000 miles in less than 72 hours from California --> Idaho (via NV, AZ, and UT) for the eclipse and back.
Aside from the total eclipse being the obvious highlight, along with the very kind folks associated with the Kamloops car show, it was fun being the first car as far north as possible on the continent (Island Lake, AB) *via superchargers only* by way of the brand new SC at Edmonton.
Worst trip in almost 3 years (and ~200 SC sites visited) insofar as supercharger pedestal/site quality was concerned.
Here's what I did and sadly have to resort to doing - I encourage you to do the same prior to any long trip, unless and until they implement the feature request described later in this post: Simply email or call Tesla for a health check for the SCs along your route. They'll tell you what sites are completely impacted or partially impacted (e.g., avoid tower 3 (3A, 3B) or use 1B or 4A).
The feature request (already logged by someone else) is to display an orange or yellow mark in what now is the series of red/grey marks that indicate the number of stalls in use. Unfortunately, this simple solution does not address the variance 'tweenst numbering formats (1A 1B 2A 2B versus 1A 2A 1B 2B), but it's a start. Of course, if a site is down completely, it's supposed to be a grey SC icon rather than red but that's not always the case either, unfortunately (see Erie, PA in May).
I don't have time to disconnect and reconnect umpteen times due to bad pedestals. That time comes right out of my sleep budget when I'm trying as it is to maintain the gold standard of 50mph gross time (1000 miles = 20 hours) across multiple days. Further, if we know a site is compromised in advance, often we can route around it (e.g, the Ohio to NY corridor) using other SCs without having to futz around with poorly-maintained Chademo* or questionable L2s. No warning is a Bad Thing.
The representatives with whom you'll speak (Tesla Ownership Support Line, Option 2, Option 1) are understanding and completely supportive of this feature request getting implemented as it will save everyone time and frustration.
The usual caveats apply - have your route displayed in Nav before you call, so you can just read off the SCs in question (e.g., Rancho, Primm, St. George, Nephi, Tremonton, Idaho Falls) and have a pen or tablet or other device (e.g., your finger and a smartphone) handy to take down what they tell you. Also realize that the information you receive is merely a snapshot in time and that the reps have zero control over what they tell you. Don't shoot the messenger, in other words. That said, I did get bad information from one rep, so use common sense - if they tell you the SC in Calgary has 2 pedestals, then realize that they've probably directed you to a closed SvC instead of the actual SC up the road. 99% of the time, the information is good and the reps as excellent as always.
The 3-5 minutes you spend prior to a 1500-mile trip will be well worth it. If you encounter bad pedestals along the way, report them. Yes, the SC team should know before you do, but that's not a guarantee, and the squeaky wheel gets the grease when the poor tech has to plan his route while braving 115F temperatures to go fix that bad pedestal at Primm either before or after an early dinner at St. George, Utah in the middle of his 14-hour day.
Once the aforementioned feature request is implemented, the onus will be upon us drivers to pay attention to the information displayed in Nav. Until that time, however, this is on Tesla and it's an easy call to make, no pun intended, 24/7.
* One example of a well-maintained network of full-strength, fully-functional Chademo would be that maintained by AeroVironment along the Oregon coast. While no longer quite as necessary due to the SCs now along that route, those Chademo can be used on an unlimited basis for $19.95/month - that's as close to free as it's ever going to get. Kudos to AeroVironment for showing how it can be done, and kudos to the host businesses for deploying appropriate signage and for fearlessly towing ICErs who evidently can't read.