We will be in port from 7a to 4pm. Should we purchase a tour through the cruise line or just grab a taxi at port? Don't have anything in mind - not into diving or horseback riding. Last time we were in port, hit Senor Frogs as soon as we could and well, that's all we saw of Cozumel. Would like to find a local hospital or Red Cross close by the pier so we can take some items to them. Any input will be greatly appreciated!