Things to Note 1. Only 50 trekkers per day will be given permit to trek Kudremukh, so it's important you speak to the homestay guys in advance and get the required permit.
2. Kudremukh is best done during monsoon and post monsoon(July-October), which is a peak season for trekking in Western Ghats, anytime before or after will be dry and trekking won't be as pleasant as it would be during monsoon.
3. Carry a raincoat or poncho, hat and a pair of good trekking shoes as the trail can be slippery.