Actually for bluegill fishing I would recommend "not" fishing during the spawn. Not only do you remove the largest bluegill because they are easier to catch but stats show it disrupts the new generation of spawning. Just my opinion but if fishing in a local pond especially I think you want to avoid that.
I also saw on tv where they were doing catch and release of smallmouth bass during spawning, and catching "lunkers" but releasing all of them because it was during the spawn. Those fish never returned to the nest after being hooked. So it affects the population greatly, best not to impact the spawn and fish for them later.