What Dick just said.
I never target lakers in the fall(Oct/November), but they are on the spawn at that time so they can be in shallow water. I've saw them in 9 feet of water one morning while trolling tight to shore. I've picked them up while trolling for salmon using longlines/leadcore/flyrods with sinking line, sometimes over deep water in November, probably post spawn fish looking for an easy meal.
The Converse Bay launch is generally user friendly into the chilly months if there isn't much snow to ice the ramp down. Many people use this ramp, so it will probably be usable with four wheel drive until the lake freezes which may be January or maybe later. It is south facing so it gets sun part of the day. Just across the lake from Converse is Whallons Bay which is one of the laker spawning bays, they will also spawn in a few of the smaller bays around Kingsland Bay State Park.