Flying out in just a couple days, need advice!

[rkanon]

I'm headed to Patagonia as my old topic states- but will be either buying a motorcycle or finding some means up from Argentina to at least Costa Rica, where I have a good friend who might get me a place ticket the rest of the way dirt cheap who knows. I have very important questions-
For a trip up from argentina back to the US, what are some things I need that may not be obvious but will be essential in my travels? I'm going in the most stripped down way possible, but I also want to havve all my bases covered a smuch as possible.
What would a good route be to take? any suggestions? I want to spend a good amount of time in the rainforest region- whag concerns should I have?
Any info you guys have would be great, and like I said, I'm leaving in just a couple days!!!
Thanks!
Rob