My wife and I, both 60ish, are planning to land in San Jose before spending 3-4 weeks in Nicaragua, and were planning to take a 3-day excursion to Tortuguera out of SJ (we're not normally group-tour types, but this did look pretty hassle-free). I would also like to do a zipline/canopy tour. One of the best looks like it's near Limon.
The logistics don't look promising unless we rent a car. Can anybody give me clues as to possible tour companies, or public buses or boats along the east coast?