I reached out to Surcos Tours in regard to a 1-day hiking trip for to Corcavado when another recommended operator failed to get back to me after a week. The prices were comparable to other operators in the area so my husband and I felt comfortable booking with Surcos. Our guide was Roger, who was knowledgeable and patient. We saw many birds and animals that we definitely would not have seen without a guide. Roger organized the permit and transportation for us and brought binoculars and a telescope. Many of the wildlife we saw were actually on the road to the park and not in the park itself.
The only snag during the process was that we arrived at our hotel the day before our tour and wasn't sure when our tour started the next day. However, that was quickly resolved with a phone call placed by our hotel manager.