Newbie- West Coast NP Expereience

[RoiM]

Hey!
I'm traveling across the US, and on the west coast I really (really!) want to do some real camping and hiking. I figured there is no better place for that then national parks. I admire nature and think the views on the west coast are something I need to see in my life.
So...
I'm gonna be in SF on september 25th. I think I'm gonna spend couple of days in the city (first time in the west coast..) and after that go out to the adventure.
I thought about starting easy, going to Point Reyes Natinal seashore, it is very close and seems pretty easy task to camp there. Following that- the Big Sur. I understood the way there (road 1) is beautiful, and camping is not such a difficult thing logistically (PLEASE correct me if I'm wrong).
The thing is, I want to know what is the best route to do in order to see the following:
Sequoia&Kings canyon NP
Yosemite NP
Glacier NP
Yellowstone NP
Grand Canyon NP

and maybe, if you guys think it's possible:
Lake Tahoe
Crater Lake
Rocky Mountains
Beautiful overview of Mount Hood (Oregon) that you recommend of (Lake/river can be nice)
Joshua Tree NP

The things I wish I knew, and ask you guys to think of are:
Weather (rain mostly) [I figured starting my northern destinations and going south, what do you say?]
Easy to camp (if i need to make reservations ahead on that time a year, please let me know whats the best thing to do about it)
How Incredible and different from anything else a place is (seriously)
How I prepare myself- Gas, Food, Water, Clothes, Camping gear
If I won't have a car- What is possible to do? and how?
Anything else you know from your experience.

I will probably do it with 2 more friends, but theres a chance I'll do it alone, so if you can note the different preparations we need to do for 3 people or if I'm gonna be alone.

I know it's alot, I know it seems like I have no clue, but it's my biggest dream to do that, and I hope you guys can help make it happen.

THANK YOU!

*Edit*
I'm gonna do it by myself.
The dates are Very late September/Very early October- November 20th
What places do you think I can do and what are much harder due to season?
If you can suggest a route, it will be a great help.