Only a few have park guards, which leaves the majority of them open sites. Please do not take advantage of this by climbing onto the statues, or the shrines, and do not disturb any bones you may see hidden amongst the rocks. Only one site has an entry charge, Orongo. They lack manpower to build and staff entry kiosks at each and every place. There is a hospital on the island, staffed by medicos from Chile, and a dentist.
Medications are fairly limited.
Inoculations are not required for Easter Island, but may be for South America or Tahiti, depending upon your itinerary. Any serious illness or injury is generally evacuated to a hospital on mainland Chile. The island has mosquitoes, cockroaches, ants, and scorpions. There are no snakes. Black Widow spiders arrived in the 1960s from the mainland and may be encountered on the north coast where they spin messy-looking webs in the rocks and tall grass.