When it has been raining for day's finding tinder bundle material can be a mess when making friction fire. Try to find a huge rotten trunk and go many inch inside to get some dry punk wood. This is my favorite tinder bundle material in wet condition when making a friction fire. If you have modern way to light fire, birch bark will do. As for the bow drill set (because hand drill is set aside in rain), just remove all the wet bark and wood from a spindle and split a large piece of wood (4-5 inch) in half for the board. This way your stuff is dry. Keep the remain wood of the spindle for your kindling, these are the driest material you will find. Have A HUGE tinder bundle and lots in spare just in case.