Your anchored brush for YP egg laying could easily be too far offshore for you to see the egg ribbons. My water is pretty clear and i place all my bush for ribbon collection with bottom butts on the bank so majority of the brush is in 6" to 2 ft of water depth so I can find and remove egg ribbons. YP will readily come into shoreline water to lay the eggs. IMO your brush will collect egg ribbons it is just you may not see very many of them due to depth and deeply placed ribbons.

After the LMB spawn in the pond the high numbers of fingerling and juvenile bass will eat very high numbers of the 1" to 4" YP before they grow to the 8" harvest size. Larger bass of 13"-15" will be eating 5"-7" YP. Young GSF will prey heavily on the YP fry. Don't be surprised if you don't catch very many 9"-10" YP in 4 years. Hopefully the amount of habitat as brush and some weed beds will provide enough refuge cover to grow you some YP for tasty fish fillet meals.