Patty,
I live in Chiriqui. I know people who live on sailboats myself and they are in Bocas del Toro.This area seems to have lots of expats doing what you want to do. In Chiriqui, Boca Chica is on the Pacific side. It has a small town, population less than 200, but they do have a protected marina where there are about 15 boats moored.It is about an hours drive from David, the capitol of the province. Other than that, Chiriqui does not have any other marinas. I think most people who have boats in Panama check into Bocas del Toro or Panama City. Jessica might know more about that area and what is available.