Is there any campsite in October you can keep your boat in the water

Several spaces offer this opportunity.

Yes, Bay Loop spot 148, 149 &150 there's a short trail from the the campsite to the water. *Note the campground shuts off water and dump station closes Mid October

Not sure, camped far away next to the road going to the boat launch.

Any site along the water you can keep ur boat in the water

Site #36 In Sage Loop, the fellow in the site next to us had his boat at the beach right at the campsite day and night. Beautiful views as well.

Yes

Yes we camped in space 106 and several people around us kept their boats tied up just off our campsite.