We've gone that way, through Moca and up over the mountain, a couple of times, last time was in March. We had two very close calls with trucks coming towards us over the 'line' in the road, and it spooked us enough that we came home along the beach from Cabarete to POP and then down through Santiago, much longer.
We also were stopped on the way up by police - our windows are all tinted, and when Mr. AE rolled down his window the cop hesitated a few moments [Mr. AE doesn't have a friendly face, he probably scowled at him, lol] before asking him "Are you military?". When Mr. AE shook his head and said no, he brazenly asked for some money for breakfast.
Harley, even though we've done it before, we missed the turn to Jamao - twice!