A friend and I went to Corcovado National Park while staying in Puerto Jiminez. We had a guide during another hike the day before, but not this time. I would suggest a guide if you are going from that far. It is a little difficult to deal with the "colectivo" bus that takes you there, and it is a four hour ride. When you reach the park from the bus, it stops at a little bar, and from there you walk on the beach for over a mile to reach the start of the hike. The beach is absolutely beautiful but it is hard to walk on the sand in hiking boots. From there, the hike we did was very beautiful. It was flat (I'm from the mountains of Colorado so I'm used to strenuous hikes uphill), but the difficult part was being able to see. Also, there was a large river, Rio Madrugada, that was at a very high level and with a strong current. It almost took me out and took my camera! All of that is the price you pay for hiking in the jungle, but it would have been better with a guide. Also, we had a guide do the paperwork to get our entry into the park. It costs ($20 per group and then $10 per person for park entry), but it is worth it. If you don't do it through an agency, it sounds like a difficult process to deposit money to the park.