Have not been to kovalam for few years, so memory bit hazy about Trivandrum airport. As I need to pay guest house on arrival will need to withdraw biggish amount of rupees on first day. I presume there are now ATM's at Trivandrum but is there a limit per day from ATM's. Also if I change cash or T/C is it same rate at airport and resort. Last time I was in Kovalam, Wilsons guest house was main currency exchange but presume there are more now. Normally I am not concerned about few rupees either way in exchange rates but as I said as fairly large amount the difference could be couple beers and meal in Kovalam.
Sorry for another currency question.