can I take a bus from Copacabana to Cuzco? Or do I need to retrurn to La Paz? Name of bus line and time?

Answer 1

Yes, you can get a bus from Copacabana to Cuzco, I did so a few years ago.

I'm afraid there's no way on earth I'm going to be able to remember the bus line or time though... It's not that hard to find one once you're there though.