I did the Pasadena -> Sacramento and back trip in my NiMH EV1 back in 2000. I had a portablized Large Paddle Inductive charger with me and plugged into dryer outlets at my overnight stops... All stops were done using 6.6 kW chargers, so we're talking 5ish hours each stop (I brought several books!) Would have been nice to have a fast-charge as an available option.
Stops were in Santa Barbara (public garage), then SLO (spent the night at a friend's house), then Gilroy (Costco), then Menlo Park (my mom's house), then Voltageville -- errr, Vacaville! (public lot), up to Sacramento and return.
Having a 140 mile per-charge range made it possible, though the stretch from SLO -> Gilroy was a bit nerve-wracking! The hill just north of SLO burns a lot of range quickly... On the way up I recall having burned more than 25% of my charge in the 10ish miles to the top, but the slope down to Gilroy stretched out my range so I pulled into Costco with about 5 miles left on the guess-o-meter On the way back I remember seeing 0 miles on the range guess-o-meter at the top of the hill.
Given this experience, I'd be surprised if you could actually make the 83 miles between SLO and King City without stopping and plugging in. The 95 miles between SLO and Santa Barbara will also be a slow nail-biter without a stop in the middle. For long-distance trips, I recommend a portable 220 J-plug -- map out camp grounds with camper plug-in services for power. (The 3.3 kW charger on the Leaf is a real drag in these cases.)
I love my Leaf, it would be perfect if it had a true 100 mile freeway range.