You should wear according to the place where you are going. If you are traveling to the cold area then you have to wear warm clothes otherwise light clothes will be better. Don’t wear indecent clothes if you are traveling to the village areas.
It is better to reserve the vehicle because if you don’t reserve you might not get the vehicle of your choice or you have to spend extra days to wait for the desired vehicle. And if you are traveling on occasion time, you must make a reservation.