The transcontinental is a demanding hike, so just make sure you are in very good physical condition. It is a hard walk between 11 and 16 days. You can start at the Caribbean side Suretka, and finish in Buenos Aires Ujaras on the Pacific side or the opposite. You would have to bring and carry your own food, water, clothing, sleeping or hammock, gas cooking range etc..
For this tour the reservation must begin at least two months prior since the permit SINAC is needed to cross the La AMISTAD Park. Transport is not included to the starting point. What is included is the adventure of a lifetime.