I'm now thinking of spending an extra day or so in Humacao, then walking along the coast. I can get to the central mountain valley later, from the other (northern) side, if I feel like it. However, this is probably my only chance to see this section of the coast. Also, I feel much more like going for a beach stroll than hiking up a mountain now.
I'm starting to renormalize. Feeling more like a person in a developed country again. After Cuba, I had to fix up banking, clothing, etc. Still working on it, and of course while adventure traveling one always feels extraordinary!