South America General Questions

[HP]

So I came to South America for 2 months. 3 weeks organized tour, and 5 weeks volunteering

Well, I found out I'm not the organized tour kind of person, and I'm kind of sick of digging ditches in a remote village. Me and a friend the other day changed our plane tickets to give us an extra 3 months so we can explore on our own

We're in Peru atm. We are thinking of something like:

Peru-->Bolivia-->Argentinia-->Brazil-->(fly to) Columbia, then if we have time, go up into Central America

Any input at all is appreciated.

We are not sure if we should hit up Paraguay and Uruguay, I've heard they kind of suck. Also, Chile looks kinda expensive and bland so we are thinking of skipping that

Anyone know which countries are good for hitchiking?

fwiw both of us are more into partying in cities than like hiking and stuff