We are planning to visit Nicaragua in July, no hard schedule, thinking 6-9 days, will be coming via Costa Rica at Los Chiles boating the Rio Frio to San Carlos. We would like to visit El Castillo, and then go on to either Managua or Granada. Is San Carlos worthy of a couple of days, same with El Castillo? We are more the selfguided types in terms of hiking around the local area or taking a taxi or bus versus organized tours. My friend is bi-lingual so language won't be an obstacle. After seeing the sights there we'd like to move on to either Managua or Granada. Should we take the bus to Managua or the ferry to Granada. Granada and the surrounding areas seem a bit more attractive, but would appreciate some input from those who've been before.
Advice on planning the details would be greatly appreciated.