This was my favourite national park in Madagascar. There are plenty of wild Lemurs - we saw the bear-like Indri , as well as the diademeds and a few nocturnal ones as well. The walk through the forest is not that hard although you do have to bend your way through branches etc. You need to go with a guide - my advice is to do some research on the guides before you go and follow a recommendation if you can. I was hoping for more indepth information on the lemurs but felt our guides were more focused on spotting the lemurs and making sure we got the best photos rather than imparting knowledge. As with most wildlife tours these days , there are crowds of people around the lemurs when they are found - am told this can be up to 300 people at a time. It was already around 100 when I was there. Avoid the July - Sept time frame if that is going to annoy you. Despite the crowds, I still found this to be the most interesting forest to visit - especially with the cry of the Indri floating through the trees. You'll need binoculars and long lenses to really see the lemurs - these are wild lemurs and they tend to stick high up in the trees. It was a privilege to be able to see them.