you will love it this was the hi-light of hiati,
when i did the zipline i just left my beach bag with friends but my camcorder i took with me as i video the decent.
just a quick tip when you go down lie right back you will get a lot more speed this way i was told to sit up right and i was really slow going down.boring!!
also when your there depending on time go and hire the jet ski's they are awesome.
hope you have a wonderful time