The first thing that I want to share is the essential tips that you should think of it before visiting Kerala:
Kerala Travel Tips:
Clothes: Backpack yourself with light cotton outfits. For hill stations like Munnar and Thekkady carry some woolen clothes along with cotton clothes.
Water: Carry some extra water to hydrate yourself while traveling as days can be too hot to handle and can suck your whole energy.
Torch: If you are going for trekking or boating through mangroves forest you will require one torch.
Backpack yourself with Umbrella: I will suggest you to carry an umbrella as sudden unexpected rain can happen and it will also protect you from hot sun. I uses Automatic Travel Umbrella with Wind Vent It suits me a lot because it automatically open/close and furthermore it is easy to handle.
Dress codes for temple: Certain temples have dress code for entry like Shree Padmanabham Swami Temple, so you have to follow that.
Mosquito repellent: You will require Mosquito repellent if you are staying in houseboat at Alleppey. If you are travelling through mangroves you need this. the best repellent that I use is Dabur Naturals Mosquito Repellent spray It is very cheap.
Camera: If you are a photography enthusiast like me, then it is one of the most important things that you should carry for Kerala.
Ayurveda: Kerala offers Ayurveda treatment so only those centers which are approved by Kerala's Tourism department are best suited.
Rules and regulations in Kerala: Kerala has certain strict taxi laws, Kerala's liquor policy and traveling at night is prohibited. These regulation are especially relevant for peaceful environment.
Food and accommodation: It is quite cheap to get a quality food in Kerala. Probably only in Cochin, the food is little expensive in comparison to other cities. You will find that the accommodation is quite expensive in Cochin but for foreigners it is cheap.