You can use MSR water bladder which will not be heavy and will require only little space. Learn and have knowledge about the trip You don't have to go for any exploration classes in order to learn how to go for these outdoor activities. But you need to keep in mind that hiking trip are quite challenging in various aspects. The basic thing to remember is that both equipment and gear for mountain hiking shall be completely different, relying upon the mountain that you are planning to climb along with the weather conditions. Usually needed gear list along with those useful for mountain hiking trips is given below: Clothes Similar to the simple hiking, where a peculiar type of clothes needs to be worn for the hiking purpose, mountain hiking also requires the same clothing. Following is a list of guidelines to be followed while choosing to buy your hiking boots: That "Solid" Feeling This ought to be the prime quality of hiking boots. The good-quality boots provide us with a solid feeling at the bottom, which prevents the feet from feeling rocks and stones through their soles. Hiking sticks use to reduce the discomfort in the knees that hikers may experience Increase the strength to climb up You can use the hiking stick to do some of the work for you as you need not feel heavy on your feet for all the time.4*4 model will be the best one which can be carried .The end result is that you can get up more easily and the load will be evenly distributed around the muscles. It will cost less than the traditional style one, but it may make you feel quite uncomfortable, if you happen to focus all your energy to drag till the end of your trail. Hard core hiking is quite tough and people even won't take a stick for help. They have their own different style .Mountain climbing treks as well as exploratory hiking trips are offered by few wild and exciting companies who take travel as pleasure, and are the trips on paths that are not offered by any company before. Take sufficient food and drinks for the specified hikes as well as the items involved in the list of requirements. Finally make the people well informed of your itinerary and your date of returning back. This won't be problem whenever you are joining the hiking vacation since these companies use to keep the records and files of the tours they provide.