I fished Shell last week and trolled up two walleyes (about 15 feet of water). There are plenty of smallies, some largies, northerns and the occasional nice muskie. I usually target walleyes and smallies. A few weeks ago, the south bay produced some nice smallmouth for me. There are a number of cribs in the 20 foot level scattered all around the lake. The DNR office in Spooner has a map with the approximate locations of the cribs. Good luck.