Tsingy de Bemaraha in December

We would like to visit Tsingy de Bemaraha in mid-December this year but find it difficult to organise any transport there. I understand the raining season will just be starting but we would still like to give it try. Can anyone who did Tsingy in December suggest how we can get our trip organised? I wrote to some tour agencies but they do not operate in December. Do you think it is worth simply going to Morondava hoping to get some transport from there. We would go to Morondava only because of Tsingy so in case you think this would be useless we would not go to Morondava at all. Thanks for all your suggestions.

I went for 7 days tour to Tsingy last week. I went to Chez Billy guesthouse in Antsirabe and join a tour there. Many tour guides organize tour from Antsirabe.
It was 3 days canoe, 2 nights hotel and 4 night camping. Some people contact Billy and organize the tour before they arrive. It was asking for £350 but I paid £250. It was very good trip.