In search of dragonflies ,at least two things are essential location and weather , and as you probably figured out the weather can be a problem, Dragonflies need the warmth of the Sun to enable them to fly and somewhere to come together to breed so a nice pool of clean well vegetated water that is not likely to dry out is easier to find , but frequent visits are required to find out if Dragonflies have found it suitable to there needs , so another visit to Great Park development site a day of cool temperatures when the sun was not out so only intermittent activity the smaller damselflies will just drop down into the grass and I'm not sure if they just hang around or actively crawl around in search of prey such as Midges , while the larger Dragonflies will fly to nearby trees and either hang facing the direction of the Sun and wait till it warms them again or go underneath leaves for shelter.
This Four Spot Chaser rested briefly in the grass before flying out of sight
Another photo of the first Four Spot Chaser
Some inquiries revealed these are Pardosa Wolf Spiders so named as it was thought they hunted in packs. I think these could be Pardosa amentata the females do indeed carry the egg sac around (some species leave them underground and bring them out in the sun for warmth)attached to their spinners and when ready to hatch the female tears open the sac and the young climb onto her back and stay there till there next body change . The male has club like palps that actually carry sperm and the action noted was the male trying to mate with the female via her epigyne located under the front of the body.
I only wish I had a decent video close-up of the interaction still not sure why there was so many around I will check them out again and try and find a female with the young on her back