I don't have pavers but I have a mesh safety cover and I wouldn't have anything else. Surprisingly little junk gets in the pool over the winter. If I open in mid-April (as is my usual goal. That way, with solar panels, we can swim by early May), I have a fine detritus on the bottom that my robotic cleans up (usually with 4 passes) and clear water. I try to remember to check the water level once a month and lower it with a siphon if it's high. I usually lower my water at least a foot, below the returns, in the fall.

Carl