At Martha Brae we endured an extremely long wait for rafts. Our tour guide was able to use his influence to allow us to bypass a large tour group. However, due to an inoperative vehicle used to tow rafts back to the start of the trip, there was a period of time of around 45 minutes during which no rafts appeared. In the end we waited about 1 hour and 30 minutes for our rafts. The experience was worth the wait. The rafting was wonderful and the surroundings were beautiful.
One of my favorite parts of this port was the view that we had from the 15th deck of the Poesia which appeared to be higher than most any structure on the island itself.