I know they are expensive - but what about a screened pool enclosure? We would never be able to go out from dusk to dawn without one here in FL. You'll get 2-3 mosquito bites just running from the car to the house on a bad day.

Those worm things - they must crawl across the dirt to get to your pool? Have you tried some sort of residual bug killer around the pool so when they crawl over it they die BEFORE they make it to the pool?