I travel this route weekly. I have a home in Puertecitos and try to stay informed about the road south.
The road has not improved south from San Felipe. Some vados have been paved but the rest of the road is continually getting worse. Allow 2 - 2 1/2 hours for the San Felipe-Puertecitos trip, and remember the days are short.
A mechanic (Taller Panama) monitors the VHF marine band frequencies in Puertecitos. The Pemex has gas but it is in cans and expensive. The runway is in good shape - be sure to file paperwork with the Orozco family if you land.
The road to Huerfenito is washboard and very rough, less air in the tires helps a lot. Rumor has it that the money has been allocated and repairs should happen this year.
Lots of places to stop, eat and enjoy along the way, so be kind to your oil pan , go slow and enjoy the scenery. Don't forget the important rule . . . never pass a gas station unless your tank is full.
Motorcycle riders thru town last week said they had a very hard time finding gas from Christmas to New Years. Watch for a new cantina at Campo Serena, km 74, opening this spring, as well as a restaurant and bar south of Puertecitos at Campo Cristina (Osuna family).
Lots of older people are selling their houses in the area because of the difficulty with the road, there are some good deals out there!!! There is food on the road. Laguna Percebu, Doc Lopez, Laughing Dolfin, Campo Cesar, Puertecitos (sometimes); Cinco Islas; Punta Buffeo, Papa Fernandez.