Carry mosquito and snake repellents.
Carry Electric Torches and other means of Emergency Lights, because Sagar Island does not get power from the main electric supply grid. The Island only gets few hours of power supply in the evening, form a central diesel operated power generating station, situated at Rudranagar. Ideally power supply is available from 6pm to 9pm only. There is complete blackout for the rest of the day/night. But you will never feel uncomfortable due to the sweet wind blows from sea to land, round the clock. But in the time of Sagar Mela The fair Sagar gets sufficient supply of electricity for the whole day.
Snake bite mortality is considerably high in Sagar Island. There are sufficient measures for treatment of snake bites in 'Sagar Gramin Hospital'. But it is advisable to avoid traveling at night with insufficient light. Travelers should apply some snake repellents in their room before going to bed. Snake repellents causes disorientation in snakes and will cause them to to slither away unharmed, in search of fresh air. It is better to use a mosquito net to protect oneself not only from mosquitoes, but also from snakes.
