Have not done it myself, so take this as being worth every cent you paid for it. Been doing lots of searches and other research as I want to get out there for lakers myself. You can jig for lakers, but I've never come across anyone saying they've had success doing do in Chelan. Tons of info on jigging for lakers in other parts of the country and up in Canada, but EVERYTHING I see about lakers in Chelan is trolling related. It could be that nobody's bothered to try jigging, or it's just not effecitve, or those that have done it are trying to keep it quiet so nobody else tries.
As far as launch locations, Manson has a public launch (I think) which gets you a ways up the lake, and within reasonable distance of the transition to the deep portion. There's a state park (Lake Chelan SP) on the west side of the lake basically opposite Manson that you should be able to launch from as well. There are roads that go further up the lake on the west side as far as 25 Mile Creek, but I have no idea if there's launch opportunities along that way.
Good luck!