We cruised the Amazon in Dec-Jan, no issue at all with bugs, but might be a different story in Feb. Overall, it was an enjoyable cruise, but not at the top of my list of memorable ones. The shore excursions were mediocre. The Amazon is not the rustic, untamed, wild rainforest that I had imagined. It wasn't what I would classify as an "adventure" vacation. If there are other items higher up on your bucket list, I'd recommend you focus on those instead.