Can you do it without a guide? Do you need reservations or can you walk and expect to find accommodation?
About 25 people have done it solo or as a small group of friends without a guide but it usually means someone from the organization at the WhatsApp +506 6036-6199 has to help at one point or the other since it’s not well marked.
If you are an experience long distance hiker with mountain survival skills and you
have a Garmin or a digital platform that works without cell and can guide you you can do it. You want to download from Wikiloc.com from the CaminoCR website the route
www.caminodecostarica.org and study it and then you could do it alone except section 3 snd 10.
You must study the guide available on Amazon.
Buy El Camino de Costa Rica Hiking Guide: Read Kindle Store Reviews - Amazon.com
www.amazon.com
You must be able to use WhatsApp to comunícate with lodges and camps and you must make reservations a few days prior. Pitching tents doesn’t work yet except in about 4-5 places. About every 20km there is a lodge, cabin or home stay available.
There are two sections you must hire a local guide Section 3 and Section 10.
Do you speak Spanish? It’s best if you do.
Study the altimetry it’s a challenging Camino-9,000 meter cumulative over 280 km. You must pack very light. Most solo hikers have said it was more steep and challenging than they expected.
The trekking starts through the islands ( 14 km) either Barra de Parismina or Barra de Pacuare. Actual mainland hiking starts at Muelle Goshen ( 266km of actual trekking from there) but after touching the Caribbean. It also can start in Quepos on the Pacific and hike east to end at Muelle Goshen and a boat ride to the Caribbean.
Many answers to usual questions are in the guide book. You really have to read it.