And if you haven't been backpacking before, then obviously go somewhere near home for some one night trips and then some two day, etc. Get comfortable and proficient with it before your big trip and you'll have more fun then.

But you don't need a master plan for your trip...just get online and find some cool places to visit and then go to them as your mood dictates...it's great not to be on a strict schedule and just stay an extra day here or there or leave some place "early" if you are ready to move on.

Half the fun of my big trip was researching everything online...the possibilities out there are nearly endless, so you will find plenty to do and see.