Jane and I have made 6 trips to AC in the past 3 years. We've tried several excursion providers and our fav is Suya Tours. They really give you a great Belizean perspective on the places you are visiting. Last month we did a combined Zip Line and Zoo tour from AC using their boat. It was wonderful. We've also done Maruba Jungle Spa and horesback riding, the Mayan ruins, cave tubing, and others that I forget. Staying south of town, we also use them for SCUBA trips and have found them to be the best by far. With all of that said, there are MANY good providers of these services as and long as you get good reputable referrals, you can't go worong. (Avoid the guys on the streets selling SCUBA, snorkeling, fishing, etc.) Have fun!!
Bob & Jane