Brad has been doing 'Buy one ticket and bring a friend' to some distant locations, so they are worth looking out for. He must spend a fortune on air travel and studio hire, so I can well understand why tickets are not 'as cheap as chips'. The sessions are a 'once or twice in a lifetime' experience for most people, really .
There is a ton of information about these sessions in the earlier pages of this thread, and so I'd recommend reading all the previous pages (including Brad's own posts included in them). This will give you a very good idea about the content, and in some detail too. In fact even better, because some aspects are no longer presented in the sessions.