For any kind of long journey which is probably for more than 2 days, one need to take cares following things.
Plan your tour at least at least 30days before. this is really an essential step which will make your tour plan confortable.
Advantage of this planning will reduce your tour budget. You will have enough time to book your flight/train tickets.
also you will have enough time to select your package of tour and can also gather some useful information about the places you plan to visit, without any kind of hectic time schedule you can easily
do your packing of luggage and all required stuff.
some essential stuff required during the whole journey are mentioned below
0) Clothes as per number of days (as per the season)
1) Some basic medicines for basic cure including ENO, Lemons
2) Camera (with backup plan and cell depends of the camera type)
3) Morning activity stuffs (Tooth paste, brush,soap,shampoo,conditionar,hair comber,hair oil,shaving kit)
4) Nexus with locks for saftey of luggage
5) Basic snacks
6) Tickets Soft Copy(2) and Hard copy(2) '
7) Indentity Proof of at least two main fellows (Keep soft copy in email)
8) Mobile Balance in all members phone ( with roaming scheme )
9) Chargers of mobile/Camera
10) Minor saftey stuffs (small Knife etc)
11) One coverlet
12) News papers (2)
13) Water Bottle
14) Any book if have reading hobby
15) One Diary,One Pen
16) While travelling in any private vehicle at the destination take pics of the vehicle and pics of driver
17) In hotels check all the rooms and washrooms accurately
18) Try to avoid moving in the unknown areas in night
19) Shoes, sandels and etc