My favorite lake for that time of year is Lake Roosevelt in Eastern Washington .
It's a huge reservoir created by the Grand Coulee Dam on the Columbia River . It's not a wide lake but it's 150 miles long .
Best CG is 2 Rivers . It's at the confluence of the Spokane River and Lake Roosevelt. The campground has numerous pull throughs with full hookups along the high bank surrounded by mature trees and overlooking the confluence . It also has a full service Marina with boat rentals and bait shop.
Your timing would be perfect , in late fall is when the trophy Walleye are caught .
In addition it has Kokanee , Lake Trout , Rainbow Trout , Small and Large Mouth Bass , big Perch and big Sturgeon .
For those wanting a break from catching fish , there's the historical site Fort Spokane just across the Spokane River from 2 Rivers CG thats worth an afternoon visit. Or just take a boat ride up the lake to Hawk Creek , a small inlet in the Coulee bluffs that opens into a secluded bay with a waterfall at the end in a box canyon . The scenery is spectacular looking in any direction.
I think I just talked myself into scheduling a fishin' trip this Fall !
One more thing , as you're fishing along the shore there's a good chance of seeing Black Bear , Big Horn Sheep , Deer and more Turkey's than a person can count.