Subsequent to perch spawn, go for early walleye. There are so many boats going for walleye, you can almost literally walk from boat to boat. Look for spawning areas on North Twin including the Phelps Creek entrance by the old mill in Phelps and the adjacent shorelines. Other excellent early season North Twin areas include the Hospital Bar, the Holiday Bar, the Bulrush Bar, Ozark's Bar, and the narrows between North and South Twin. Night fishing is best, and use a jig and a minnow.
Crappies spawn next.
Not known as a crappie fishery, but the best crappie fishing is on South Twin, on the southeast shore in the musky cabbage and the coontail weed growth. Great for two to three weeks and then crappies turn off. Use small crappie minnows, and you'll salivate watching the monster musky chasing the crappie around in the weeds and cabbage at this time of year. Starting Memorial Day weekend, post-spawn muskies provide an excellent fishery, as they become active on the Twins early. A thermometer or temperature gauge is essential at this time of year as musky anglers will want to actively search for the warmest water.