When in the Andaman Islands my suggestion will be to check out some of the locations that are open to travelers visiting Andamans.Here are some locations and things to do at each one.If you like exploring this is the place to go. There are mud volcanos and limestone caves. This is a backwater area and you are not likely to run into too many people.
Digipur is the furthest north that you can go on Andaman and it is not the biggest attraction location, but it is a major bus hub. Ferries and seaplanes also come to the area to transport travelers going to and from the islands. Turtle nesting, twin island and the highest peak in Andaman Island, Saddle peak are present in this destination.
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