Karen B. Golightly Last summer I took my three kids to Costa Rica to meet with two other families. For most parents, this would be a pretty big feat. For me, it was a bit more than that. I’m a single mother of three children, aged 14, 11, and 5. Pip, the five year old, has autism, mostly manifested in transitions and lack of much verbal communication. So, let’s drag the crew to a tropical country, where I’ve never been before and don’t speak the language, during the rainy season. I figured, we’d done Disney the year before, Costa Rica would be a breeze.  There were a few problems. I didn’t figure in the fact that the rental agency wouldn’t have an automatic car, or that I’d have to drive four hours, over a treacherous mountain range, in a huge pick-up truck with a camper on the back, with my…