Long Island has very little infrastructure. There is one small village, and only 1 government resthouse that must be booked through Port Blair.
The permit you receive on arrival in Port Blair is good for Long Island.
There are two reasons to come to Long Island:
Do: This is a lively village community and everyone turns out for festivals and celebrations! There is also a lot of island to explore. Lalaji Bay is about 1-2 hours'walk from the village and boat jetty.
Blue Planet has the "Tree House" restaurant and they do a range of seafood dishes, as well as Indian food and the usual tourist fare (banana pancakes if you want!)They have beer, fresh fruit juices and the best espresso coffee anywhere in the Andamans.
There is one government resthouse clost to the boat jetty with only two rooms: you must book in advance in Port Blair, in reality it is often occupied by government officials.
A better option is a new eco-resort called "Blue Planet" which has rooms around a central restaurant which is built around a tree. They also offer camping and better-quality accommodation.
Other than a few tourists at Lalaji Bay the real reason to come here is for secluded self-sufficience... you must bring all of your own gear and food and cook for yourself. The government changes its mind regularly about whether or not you can camp here... but it's possible to do it either way.
You can walk to Lalaji Bay in 1 or 2 hours or you can hire a local boat. Or you can go by boat to a deserted island. The trip to North Passage Island is well worthwhile: the beach is beautiful and deserted and you are very likely to see dolphins on the way to or from.