Most of the grass has not quite matted up but yes its better to work grass that is pop'n and active, keep your eyes open for bluegill flicking in the matt also. The edges are holding fish ambushing bait as it goes by. Its fun to throw a top water right at the edge of it and see a V wake come screaming off the grass edge to blast your bait. That frog bite should really turn on anytime now as soon as the grass fully matts up and opens up underneath.