The state park on the southwest side of the lake has both a campground and a single lane concrete boat launch with several docks. However they don't start filling the lake to its summer level till about June so I would check with the park rangers to see if the water is covering the end of the ramp before you go over. Couple of years ago I almost got stuck in the sand at the end when the water level was a little lower than normal.

Generally at that time of year the schools of Kokanee are located anywhere south of the narrow part of the lake. The narrow part of the lake is located just north of the Yacht club. When I fished Chelan last June, I did the best where the deep water comes next to the road, south of the state park. Was fishing for the Kokes at a depth of 30-40 ft in water 300 ft deep using pop gear & a wedding ring baited with worm and green glitter power bait. I've also heard white shoepeg corn treated with corn toughener from Pro-cure works well on the wedding ring instead of the worms and power bait though I haven't tried it yet.

While I've caught fish all the way into the afternoon, I would recommend fishing Chelan in the morning for kokanee. It seems like they don't bite near as hard in the afternoon as they do in the morning and you'll start missing more of the strikes as the day goes on. Also at that time of year, the wind starts kicking up around 1 o'clock and blows pretty hard until about 4 or 5 in the afternoon.