HI Dennis
We booked a shuttle via a company called Golf Got U from Boesmansnek to Mnweni in 2012 - not sure if they’re still operational
There are however many taxis operating in most Drakensberg areas and you would probably be able to arrange one from any functioning campsite/hotel at a considerably cheaper rate than a pre-booked shuttle; just ask the local employees for a number / reference. We did that in 2013 from Cathedral Peak hotel; took an hour to organise a taxi back to Witsieshoek.
Perhaps give the guys at Lotheni campsite a call and ask for their advice?
Good luck!