Hi Kibby, You can use either or in Negril.. but if you are going to use US, use small bills, as they will tell you they dont have change (and they probably dont)

Also, if they do give you change, the exchange rate is at the discretion of the vendor... As well as the pricing.

We tend to only use JA when in Jamaica. The exchange rates at the Cambios are roughtly 100 J to 1 US. So it's easy to do the math.