Snowshoe:
Don't know any links, but I would think he would want to check out Everglades National Park -- there must be a National Park web site link.
If he wants to drive out to the Fla. Keys, there is John Pennecamp State Park on Key Largo, and Bahia Honda State Park on Bahia Honda Key just SW of Marathon. It would be a bit of a drive from W. Palm, but probably worth it. I camped both these places as a kid, so I haven't been there in 25 years or so, but I remember gorgeous beach front camping at Bahia Honda. John Pennecamp has protected a coral reef, and there are cool snorkling trips out to the reef with a ranger. At least there was when I visited in the olden days.
Sorry I don't have links for you!
Laura