What you pack and need is a very personal thing; one tourist's essential is another's waste of space. So go on youtube and look for gear lists so you can gauge the range. Make a list and then think if you really need each item, people often pack too many clothes. Then assemble your gear and go out for an overnight trip to test things out. To complement the other links and lists already given here is mine.

http://wheelsofchance.org/2012/12/25/gear-list/