Great story - if anybody ever finds a semblance of a path on Icidi, please let me know!
I haven't been to Jubilee but Grasscutter's Cave would certainly not be described as small! The sleeping area is limited as far as I can remember (we didn't sleep there, just walked past) but the overhang itself is massive. Like something you would expect to find in Golden Gate.
Another one to add for some Icidi nostalgia:
We came down the pass in 2001 with the constant presence of helicopters in the river below us. A few hours later, just after a scramble past the first waterfall, we arrived at the scene. There were about 6 slaughtered cattle lying in the river. The police were on the scene - hence the choppers. After explaining to us that Basotho had raided the cattle from the foothills and slaughtered them at the first major obstacle in the pass (presumably carrying the meat up the pass into Lesotho), one of the policemen requested that we take photos of the scene as they did not have a camera with them. He left us with the address of the Bergville police station and we posted the images to him a few days later.
Needless to say, we waited until we were well up the Mnweni valley before drinking from the rivers again!