I would suggest Wilderness Lodge. We stayed there last October with our 5 1/2 year old grandson, and like it so much that we are returning in June. The boat ride to MK is short, and very pleasant. If you keep watching for discount codes there is a possibility that you may be able to get one for October. Last October we were able to book WL with a code for 139.00 a night. We had a room on the fifth floor that overlooked the lake, it was awesome. We could see the water parade every night from our balcony. You may also want to check out Mickey's not so scary halloween party. We had a blast!
Have a great trip. October is my favorite time of year to visit WDW.