We were in Plakias from 10-24 July and found the whole place much quieter than expected - we normally go for the last two weeks in August. The far end was pretty quiet most of the time, with sun beds available if you needed them. As "freelance" sunbathers (we tend to go down early or late for a fairly short time and just put our towels down on the beach) I am quite glad that there weren't many sunbeds out, as it is annoying to see rows and rows of empty sunbeds. However I can understand that you wouldn't want to be rushing to claim a sunbed.
However, I would like to stick up for the two guys working on the beach and the sunbeds at the far end, as they were working really hard to keep the place clean no matter what time we were there, raking the sand for cigarette butts and other detritus left by inconsiderate humans, watering the dunes to help the grasses to grow and even watering the sand to reduce the sand-blasting on windy days (it didn't work as the wind kept changing direction). One morning a couple of horse riders came down and one of the men stopped them - my Greek was not up to understanding much of what was said, but the gist was "Don't ride on our beach". One of the horses answered a call of nature, and after some discussion and arm waving one of the riders got off and simply kicked a hole in the sand at the water's edge and kicked the poo into it and covered it with sand, and rode off. I don't suppose horse riders carry a pooper-scooper. The two men to their credit dug it out and cleared it away, avoiding a nasty mess for people walking along the water's edge in their bare feet.
So I say three cheers to the people who work to clear up other people's mess and keep the beach clean, even if they do not supply enough sunbeds for some people's liking. We're going back for a week on 28 August, and I bet it will be wall to wall sunbeds at the far end!