Foam poppers just left on the surface are great tempters for the big gills. The small fish may nibble at it, but if it's a decent sized popper only the big fish can swallow it. Like I said before leaving it on the water for a long time without movement seems to trigger something in the big fish and eventually they nail it. Had similar luck with crappies.
Landing a 10 inch bluegill on a 2or3 wt fly rod in the lily pads is going to be a formidable task. Good luck :-)
Have you brought joy to someone else's life? Take a kid hunting.