There's lots of info on bikepacking.net if you haven't checked it out already. I'm a bikepacking rookie, but Outsiders's pretty much summed it up.
If $ is no object, contact Revelate or Carousel for a full set of kickass gear.
The other end of the scale is ghetto bikepacking. Get some cheap drybags and a rack and strap them to your bike. Maybe make a framebag and stuff the rest in your pack. Jannd sells a cheap, smaller sized framebag that allows you to still use your bottleholder.
And of course there's the creamy middle. Patch your own system together. If you can't sew I would invest first in a framebag. Its easy to strap a dry bag to your handlebars. I've been using a rack in the back. I think its more versatile in terms of using different bags and sometimes I strap tools to it. The revelate/carousel seatbags are definitely lighter and cooler though. I've been drooling over Eric's (revelate) seatbag/shaped dry bag combo for a while.
I give a thumbs up to the gas tank as well. Great place to stick a phone or camera as well as stuff like chapstick, a bit of food to have handy, etc.
Generally speaking, the frame bag is the core of your bikepacking setup. Depending on your frame... smaller fatbacks have tiny main triangles. Put the heaviest stuff as low as possible on the bike. As in stuff the frame bag with tools, tubes, water, dense food, etc. Lighter stuff will go on the bars and seatbag/rack. The less weight you carry on your back the better.
Hope that helped, I'm still in the process of changing/perfecting my setup myself.