I was there a couple weeks ago. To get to that beach, I walked down and cut behind the ruins of Papagayo. Easy walk.

Second part: There were very few local pervs around. In the seven days that I was there, one day there was one idiot who was (literally) hanging out in the shadows of a wrecked chalet. Other days, the local guy who was there stayed under the shade of Papagayo, and didn't venture out. I got the vibe that this guy made a living selling goods and services to people who approached them (goods = weed... services = not my thing).