I have heard this has been an issue with owners: Owners accruing idle fees because the valet didn't unplug. One owner had to pay big $$ for overnight, but then Tesla credited it back.I've only used valet superchargers as part of "check-the-box supercharging" to add it to my locations visited. I've never looked at the rates, but I would think (hope) Tesla would not apply idle fees at valet locations given the owner cannot directly access the vehicle to ensure it's unplugged promptly.
Since this is Hawaii, and Kahala Hotel is already planning to lock Tesla owners out unless they Valet $$ (according to employees), I'm sure they will execute it in the worst, most inconvenient head scratching manner possible. Look at the history ...
1. putting in a "temporary" 250kW Supercharger which only charges 6 cars at 70kW each. Permit was for 12 x 250kW.
2. Putting the first superchargers on Lanai instead of Oahu
3. Finally paving a pot hole ridden road, then digging it up months later to work on utilities, and not paving it smooth again.