These are all practical considerations, and there are many. But the rewards from such a trip are not all in the realm of practicality. After all, getting from point A to point B is not exactly the ulitmate goal here. Enjoyment and satisfaction from such a trip is as much determined by your attitude as by your preparedness. Do the best job you can on taking care of the practical considerations, and then with luck, you'll be able to leave all that behind and really take advantage of the experience.
Long trails are great.
They give the hiker a goal, the end of the trail. Although accomplishing the task is a great reward, it is far from the greatest reward. From the first time I spent any length of time camping, I have found a powerful state of mind forms from emersing myself in the wilds. It's a perspective that I can find through no other activity. Notes from off the trail.