Without question, for Dunn's River Falls contact Trevor Hudlin. We just returned from Ocho Rios a couple of weeks ago and published a special report about his services. He is AWESOME! Here is a link to the special report and his contact info:
As for transfers to Port Canaveral, there are a number of transfer services available - you can check out the many options at the Port Canaveral website. Here is a link:
. The cost will run anywhere from $60 (Art's Shuttle) to $90 (Around the Clock), but you might want to consider doing a one-way rental to the port (it is often the cheapest option).