Hi Bill, I am currently reading "Sou'west in Wanderer IV" (Eric Hiscock) and though it dates back to 73, I found his description of their trip through the canal, Costa Rica
and on up to the Sea of Cortez
very interesting and informative. It might be worth reading if you have time and can get a copy. He discusses prevailing winds, currents, anchorages
and some of the local history
and culture. I will be in Costa Rica
in late January but I will probably miss you as I expect you will be through there before then. You may be in our neck of the woods if you pass through Golfito.