I remembered you asking last year too, chuckles. Wondered if you ever found out.
Well....after 6 phone calls to 4 different people I got an answer....sort of.
The public dock at Linesville is left in year round, so you're good until ice on.
The mooring dates, if you leave your boat there, are; open 4-1 close 10-31.
The boat rentals switch to weekends only starting 10-1 and continue until the marina head decides to close for the year - depending on weather & lake conditions this may be at the end of october or go into november.
So, there ya go. Hope this helpa
And a big thanks to Tom?, Fred, Jean & Pete for the assistance.