Yesterday we had plans to be in Claremont and Pasadena, and drove the LEAF 161 miles in total. Thanks to the availability of L2 charging at our destinations, we didn't have to actually wait for a charge until we reached the QC at the 7 Eleven in San Bernardino. This was the only available QC in the area, as according to PlugShare, all three Nissan dealers' (Fontana, San Bernardino, Metro in Redlands) QC units aren't currently available!
We were thus taking a chance on a single point of failure, as the alternative would have been 3+ hours of L2 (at 3.3 kW). Even so, after I selected "100%" on the Blink, it once again stopped upon reaching 90% indicated, at 66% in GIDs which is a little below our car's "80%". After some L2 charging (and shopping) at the Redlands Walmart, we were good to go for our 4900' climb back to our mountain home.
The moral of the story is, if you're willing to take chances on a single QC working (I am thankful that the land developer had it installed), then it's still feasible to QC and then drive into the San Bernardino Mountains. With a newer LEAF, the "90%" charge might be adequate by itself, with no additional L2.
2011 LEAF at 71K miles, pre-owned 2012 Tesla S 85 at 98K miles
LEAF battery: 9/12 bars and < 49 Ah (-28% vs. new)
Tesla battery: 250+ miles of range (-5% vs. new)