Besides campsites, there are no facilities available for overnight guests to this watery park. Most noncamping visitors come for an afternoon, on their way to the Keys, and stay overnight in nearby Homestead, where there are many national chain hotels and other affordable lodgings.
Although you won't find hotels or lodges in Biscayne National Park, it does have some of the state's most pristine campsites. Since they are inaccessible by motor vehicle, you'll be sure to avoid the mass of RVs so prevalent in many of the state's other campgrounds. The sites on Elliott Key and Boca Chita can be reached only by boat. If you don't have your own, call tel. 305/230-1100 to arrange a drop-off. Transportation to and from the visitor center costs $27 (plus tax) per person. Boca Chita has only saltwater toilets (no showers or sinks); Elliot Key has freshwater, cold-water showers and toilets, but is otherwise no less primitive. If you didn't pay for the overnight docking fee, campsites are $10.
With a backcountry permit, available free from the visitor center, you can pitch your tent somewhere even more private. Ask for a map and be sure to bring plenty of bug spray. Sites cost $10 a night for up to six persons staying in one or two tents. Backcountry camping is allowed only on Elliott Key, which is a very popular spot (accessible only by boat) for boaters and campers. It is approximately 9 miles from the Dante Fascell Visitor Center and offers hiking trails, fresh water, boat slips, showers, and restrooms. While there, don't miss the Old Road, a 7-mile tropical hammock trail that runs the length of Elliott Key. This trail is one of the few places left in the world to see the highly endangered Schaus' swallowtail butterfly, recognizable by its black wings with diagonal yellow bands. They're usually out from late April to July.