Things to notice:
1. Carry cash in your hand. The stores will not accept digital payments
2. Public transportation is very limited here. So, take an autorickshaw from Rameshwaram.
3. If you drive your own vehicle, you have to pay Rs.20/- on check post while entering Dhanushkodi.
4. Jio and Airtel don't have mobile networks there in Dhanushkodi.
5. There are a lot of isolated beaches on the way. Be careful while getting down on those places.
6. Seafood is very good there. Pick the right ones, some might be older.