Had to have the backyard dug up to replace a failed septic pipe, and now it is a mess. I had previously yorked raked the area and got it quite smooth and planted grass 20 years ago, but there were only small rocks in that material. Now the area looks like they imported rocks to plant in the material, and some of them are quite large. I just don't know where to start. Should I try York raking them out and then till the soil to get the rest of them loose or should I just keep raking until all that is on the surface is gone? Right now, the material is quite damp since it has been raining for the past day. Should I wait till the surface dries out or start in even though it raining on and off for the next few days? They are coming back in about 4 weeks to spread loam onto the top to plant the lawn, however, from experience, I have found that every spring a huge amount of rocks come to the surface that will interfere with the lawn mowing.