Long Elliott Key has picnicking, camping and hiking among mangrove forests; tiny Adams Key has only picnicking; and equally tiny Boca Chita Key has an ornamental lighthouse, picnicking and camping. These little islands were settled under the Homestead Act of 1862, which gave land freely to anyone willing to take five years at turning a scratch of the tropics into a working pineapple and Key-lime farm. No-see-ums (tiny flies) are invasive, and their bites are devastating. Make sure your tent is devoid of minuscule entry points.