Personally, I wasn't impressed by the blog entry. It appears to be written by somebody who has no clue about the reality of charging EVs (but, maybe it was simply written for people who have no clue about charging EVs)... For example, it isn't "220V" charging, it is "240V" charging (and has been for the past 30+ years).
Electricity was too expensive? You are responsible for due diligence. You simply fell into a newbie trap, and paid too much. You didn't need to charge up to 90% SoC in Buellton, for example - complete overkill (and adding to the over-expense of the charge, since part of it was a per-minute cost, not simply a kWh/rate cost). Your hotel didn't have L2 charging? Your fault (guess what: you are responsible for due diligence.) In fact you should be calling the hotels in the area that you are potentially interested in, and telling them that "oh, you don't have EV charging available - what a shame - that's a deal-killer for me!"
But then I over analyze everything. Most I ever paid for charging was $0.32/kWh, and it as earlier this month. It was my THIRD backup (i.e., 4th choice) on a weekend when it was 106 degrees and the other 3 chargers were already occupied.