I think the carts are around $60 a day and the only drawback is that the thingy that takes you across the river closes at 8:00 so no late nights out in the cart and you still get stuck paying for the water taxi. I wanted to get one for a couple days just to do a full exploration of the island -- and bar hopping during the day. I don't think you can really check everything out on a bike and I am more into exercising the arm lifting the beer than peddling all over, if you know what I mean.