Here's a rundown of the ways to get around Ambergris Caye.
1. Walking: As I mention in my overview, walking is the best way to get around town. It only takes about 20 minutes to walk from one end of the main strip to the other. And, 90% of things to do in Ambergris Caye are on the main strip.
2. Taxi: Now, there are a few taxis around Ambergris Caye, but I did not use them. The only people that I saw using them were big families with either very young or elderly travelers.
3. Golf Cart: Now this was an interesting sight. Everywhere you go there are golf carts. Most locals have them and some tourists rent them. However, I don't think they're necessary unless you're staying at a hotel that's pretty far away, or you have members in your party that aren't keen on walking.
4. Water Taxi: Water taxis run between downtown and the resorts that are located farther north of town. They run pretty regularly and they leave from the dock at Fido's. There's a schedule located at the dock, and also within Fido's. The ride costs around $10 US. Here's a warning: the taxis are not covered. So, if it's rainy, you get very, very wet. However, if the sky is clear, you can see every star in the sky, which makes for a spectacular ride.
The water taxi that takes you to the mainland or to other islands leaves from one of the docks about halfway between Fido's and the airport. Sorry, I don't remember the actual location.