I've made a reservation with the Helisul helicopter tour operators (http://www.helisight.com.br) to do their 60 minute flight on the morning of October 11th.
I'm travelling alone, but the flight only operates with a minimum of 3 passengers, so I may have to wait for others, pay for the empty seats (which I really can't afford), or choose an alternative tour.
I'm posting this message just in case anyone else is planning on doing the same helicopter flight which could mean that we combined our reservations in order to be sure of being able to do the tour. The 60 min flight costs R$875. I could maybe do it on the 10th instead, if that fitted better with anyone.
Post a reply here if you think we might be able to combine reservations, and we can get in touch to work out how best to co-ordinate things etc.