Actually I’ve been to Wick twice in the last 3 months but more often to Inverness.
Typical site visit is.
Leaving just south of Motherwell first stop is Ballinluig Motor Grill. Second stop is at North Gateway Cafe. If the jobs are around / between Inverness and Aberdeen I might catch a lunch in Inverness or maybe one of the garden centres in between, before heading over to Aberdeen where I fuel up before heading down to Forfar for an overnight stay.
Roughly 12-13hrs all told with 20minute breaks.
If heading up to Wick I recommend stopping at the cafe at Evelix, (might be a wee stop in Tain but I wonder why

) order a plate of scampi and chips and you get 13pieces of scampi!
The run up to Wick has been about 7&1/2hrs maybe 8. Given I work an 8&3/4hr day the remainder is taken as a rest as the drive is knackering. (Kudos to those who travel to stalk up there.)
Last run was 760miles as I came back down the east coast, so it does almost equate to John O’Groats to Lands End.
I’m not sure the company would be grateful if I wasted time waiting for a charger to come free or trying to find one that’s working, and it would bore the pants off of me!