Don’t worry so much. You’ll probably have to spend your first night at the Edicar Hotel. Once there, ask the owner to get in touch with Dan and or arrange for you to meet the “arrieros” (they use horses, not mules, and remember: the best is Eva, then Favian and last Ciro). You can call them first if you want 56-65-216256, but they only speak Spanish. As for the permits, you could get them at DIFROL (not at the Embassy), but you wont need them for Cochamo, as it’s not so near the frontier (it’s different for Paine). There is no Internet at Cochamo town (at least not last year) so only when Dan or Silvina go to Puerto Montt (or Ensenada) they are able to look at their e-mails (it’s a four/five hours walk from the valley to town –with rain it can be really hard-, and a 130 kms/50 kms drive, so people tend not to do it unless its really necessary).
You might get some help/info from the people from Campo Aventura, http://www.campo-aventura.com/tour-oper ... lodge.html
, but remember they are expensive (they think in Euros).
Don’t worry, go and things will take care of themselves.