We have camped down there many, many times. It is always the luck of the draw. I would follow TroutD's advice and book somewhere else for the backup. One thing you can do also is that when you are there, each morning (you have to also get up early and be at Bahia Honda) they will give away cancellations. One year we were at the private campground close by and went to try it out. First day, nothing. Second day we got a site and moved for the rest of our week.
Beth Wallace & Chris Sanor
1966 26' Overlander International
Towed by 2006 Dodge Dakota 8 cyl.
Tin Can Tourist