This is the link to the 2011 map, it's a little outdated, but will give you a good idea. http://www.talkofthetownnegril.com/N...ap_2_15_11.pdf
Keep in mind that it's not to scale, pay attention to the km markers on it.

We never use a Cambio, (we wd from the ATM's), but I believe there's a Cambio near Bourbon Beach that a lot of folks use... I'm sure someone will be able to help you out with that.

Good grocery store - there is a small store accross the street from Coco - Mikey's. He carries beer and a few other items. A little ways towards town is Shamrock Grocery, they have more of a selection and great freshly squeezed oj. We typically just take a cab into town to the HiLo or Quality Traders when we need supplies.