They never checked our papers or our plates vs disks at all....
However... do NOT arrive at the top after dark !!!
On a recent trip ... Swifty, myself and Bender clocked into the bottom of the border at closing time... 18H00.... we had no choice as we were pushed for time after some minor tech problems earlier in the day.
I arrived at the top after about 15 minutes and Swifty soon followed... we waited for Bender but as we could not see for the mist I deciced to ride back down... he was about 6 switch backs below and had gotten stuck in a rut.... I helped him out and we got back to the top.
In the meantime Swifty found the border closed and deserted and had "idled" through a gap in the fence just to the right of the border post to go to the Sani Pub....
5 Border Gaurds came running after him and arrested him for "Illegaly entering Lesotho"..... they took his helmet from him and by the time Bender and I got there they were a little "irate" It took me a long time to get them to let us in... ( I had to part with a few "Mandelas" ) and we got the helmet back...
We went back the next morning to be stamped "In" to Lesotho.... so if you put a foot wrong... remain friendly and always feign a little stupidity.... it worked for me !!