Wow, I was in Charleston this past spring, and didn't go to this hotel because Plugshare said it was only for patrons -- I never considered just tipping the valets to use the HPWCs. (It was also way to expensive to stay there!!). So as that wasn't an option for me, I found several 240 J1772 chargers in downtown Charleston -- I used the one at the Galliard Garage which was a quick 7-10 minute walk from my hotel (Francis Marion), and it was free for the power, but I had to pay for parking. There are a few other J1772s around downtown in the public parking areas too (see plugshare). So your comment about the only other option is "an 8kw 30 miles NW or 120volt outlet" seems odd, and not quite accurate -- there are other 240v options right in downtown Charleston.